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  • Description
  • Reviews (50)
  • Bike Locks Guide
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  • Product description

    The Kryptonite Evolution Series 4 U-Lock is a true deterrent for any thief, so you can be sure your bike is safe - whether you're at work, shopping or at home. Sold Secure Gold with £1,000 anti-theft protection this bike lock provides the highest level of security for moderate to high crime areas.

    The patented double deadbolt locking mechanism has extensive holding power, while the reinforced internal housing has incredible resistance against twisting or leverage style attacks.

    Anti rattle bumpers will prevent scratches to your precious bike frame, and the Evolution Series 4 itself weighs surprisingly less than you might expect from such a sturdy lock. It's definitely light enough for you to put in your pack. The Kryptonite Evolution Series 4 U-Lock should be on every cyclists wish list.

    Weight - 1.8kg (includes keys & fittings)

    Features

    • Bicycle security for moderate to high crime areas, with a standard length shackle
    • 14 mm hardened Kryptonium steel shackle
    • Patented double deadbolt locking mechanism for extensive holding power
    • High security ovalised cylinder that makes this a sold secure gold lock
    • Reinforced sleeve over crossbar and cylinder provides enhanced security protection
    • Reinforced internal housing increases resistance to twisting and leverage type attacks
    • Offset key location and overhead cam locking mechanism resists leverage attacks
    • Double deadbolt locking for extra strength against leverage attacks
    • Anti-Rattle bumpers keeps the shackle snug against the crossbar and prevent unnecessary noise
    • 3 keys, including 1 lighted
    • The Transit FlexFrame-U mounts quickly and easily and supports the transportation of the most common u-lock sizes
    • The Flex Frame-U fits bicycle frame tubing 25mm to 80mm whether round, oval, triangular or square shapes
    • The mounting system allows for 360 degree rotation providing the ability to micro-adjust the lock angle to better fit and align with a bike frames specific geometry
    • Rotating dustcover over cylinder protects from dirt & grime
    • Vinyl coated and weatherproof
    • U-lock dimensions: 10.2 cm x 29.2 cm x 14 mm

  • Kryptonite Evolution Series 4 U-Lock with FlexFrame Bracket Reviews

    Write your own review
    Overall Rating:
    4.7
    out of 5
    4.74
    Build Quality
    4.73
    Performance
    5
    Value For Money
    4.71

    Customer Reviews (50)

    5
    Great Lock

    A good solid lock, the longer length is handy at times to get round the bike and the fixed object... by far the most solid lock I have had. Very pleased. However with an "E-bike" it is a job to find space for the carrying bracket, if I bought the smaller model I would need to carry a cable with it as bike stands etc are thin on the ground here.

    A good solid lock, the longer length is handy at times to get round the bike and the fixed object... by far the most solid lock I have had. Very pleased. However with an "E-bike" it is a job to find space for the carrying bracket, if I bought the smaller model I would need to carry a cable with it as bike stands etc are thin on the ground here.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Looks very sturdy

    Looks like a very good quality lock. It is very big (there is no way I can mount it ANYWHERE on my Cannondale Quick 6) Will leave it as a spare lock to take it in my rucksack when I need to leave my bike outside for a long period. Will get a mini lock for my commuting needs. The up to £1000 guarantee what Kryptonite offers is a great bonus!

    Looks like a very good quality lock. It is very big (there is no way I can mount it ANYWHERE on my Cannondale Quick 6) Will leave it as a spare lock to take it in my rucksack when I need to leave my bike outside for a long period. Will get a mini lock for my commuting needs. The up to £1000 guarantee what Kryptonite offers is a great bonus!

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    4
    Good lock

    Upgraded to this lock. Good features: 3 keys and one with a little light, together with free replacement lock. Also it has a handy frame attachment. It is very sturdy and only criticism is that it is a bit heavy.

    Upgraded to this lock. Good features: 3 keys and one with a little light, together with free replacement lock. Also it has a handy frame attachment. It is very sturdy and only criticism is that it is a bit heavy.

    Close review
    4.2 out of 5
    Build Quality: 5/5
    Performance: 4.5/5
    Value For Money: 3/5
    5
    Quality lock, great price

    I originally ordered the longer lock but decided to swap it for the shorter one when it arrived as the longer one is a bit excessive just for locking a standard frame to a bar or pole. It's fairly heavy but comes with a bracket to attach it to your bike. Luckily not had the chance to discover if its sturdy but it feels v sturdy and allows me to lock up the bike with confidence, especially with the shorter version as it leaves little room for leverage.

    I originally ordered the longer lock but decided to swap it for the shorter one when it arrived as the longer one is a bit excessive just for locking a standard frame to a bar or pole. It's fairly heavy but comes with a bracket to attach it to your bike. Luckily not had the chance to discover if its sturdy but it feels v sturdy and allows me to lock up the bike with confidence, especially with the shorter version as it leaves little room for leverage.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Solid and good value

    Bought the longer of the two locks. (29.2cm) Quite heavy and solid. Would suggest a squirt of oil / WD40 into keyhole before use. 3 keys provided one with a key light. Have not used the bike bracket as use these in my garage through a wall bracket. Needed the longer version for this.

    Bought the longer of the two locks. (29.2cm) Quite heavy and solid. Would suggest a squirt of oil / WD40 into keyhole before use. 3 keys provided one with a key light. Have not used the bike bracket as use these in my garage through a wall bracket. Needed the longer version for this.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Solid lock

    I bought two of these locks on the advice of a friend who lives in Hackney and his bike is locked up outside his flat most nights and it has stood the attempts of a few would be theives. I must say I was delighted by the solid quality of them, not had a chance to use them yet, but feel secure in the knowledge my our bikes are safe.

    I bought two of these locks on the advice of a friend who lives in Hackney and his bike is locked up outside his flat most nights and it has stood the attempts of a few would be theives. I must say I was delighted by the solid quality of them, not had a chance to use them yet, but feel secure in the knowledge my our bikes are safe.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    solid lock

    With stands heavy duty bolt cutters. A must have :)

    With stands heavy duty bolt cutters. A must have :)

    Close review
    4.8 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 4.5/5
    5
    Good solid lock - weight no issue in a backpack

    Came quickly with next day delivery (but on my next order of helmet + shorts I had to wait a long time as the website showed stock was present when it was actually not in stock - something to be aware of if you need something urgently. Victims of there own success as the website does not update quickly enough with demand). Not using the bracket, I just pop the lock in my backpack and have no problems with the weight. Hardly feel it's there and its a quality lock. I ordered the longer version to give me a bit more flexibility. Excellent price from Tredz. I would buy again. No issues with key sticking as yet - there are clear instructions that you have to insert the key fully before attempting to turn. Oiling also recommended with a squirt of WD40 once in a while.

    Came quickly with next day delivery (but on my next order of helmet + shorts I had to wait a long time as the website showed stock was present when it was actually not in stock - something to be aware of if you need something urgently. Victims of there own success as the website does not update quickly enough with demand). Not using the bracket, I just pop the lock in my backpack and have no problems with the weight. Hardly feel it's there and its a quality lock. I ordered the longer version to give me a bit more flexibility. Excellent price from Tredz. I would buy again. No issues with key sticking as yet - there are clear instructions that you have to insert the key fully before attempting to turn. Oiling also recommended with a squirt of WD40 once in a while.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Kryptonite quality U-lock

    Great quality and strong lock, perfect length size to get quick release front wheel and frame locked in, easy to install bracket, all at a good price thank you Tredz.

    Great quality and strong lock, perfect length size to get quick release front wheel and frame locked in, easy to install bracket, all at a good price thank you Tredz.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Kryptonite evolution 4

    Top quality. Nice design and using the nice key that comes with it (with a blue light) it's a pleasure to open and close. It has to be that heavy to be so strong! Very good price too.

    Top quality. Nice design and using the nice key that comes with it (with a blue light) it's a pleasure to open and close. It has to be that heavy to be so strong! Very good price too.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Very strong lock

    The lock is very strong and has a nice feature witha light on the key. The lock is heavy so would'nt be good transporting it over a long distance but for secure small journeys. Priceless and worth the extra couple of quid

    The lock is very strong and has a nice feature witha light on the key. The lock is heavy so would'nt be good transporting it over a long distance but for secure small journeys. Priceless and worth the extra couple of quid

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    kryptonite evolution 4 LS

    Excellent build quality and can just clamp our two mtb bikes with LS lock. Also super price, thanks tredz.

    Excellent build quality and can just clamp our two mtb bikes with LS lock. Also super price, thanks tredz.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Great high security lock for town use

    Having lost the key to my trusty Squire D-lock I was looking for a 30cm replacement. I really like Kryptonite locks but the older style bracket was a faff to fit and the lock would often jam in the bracket. The new style bracket is an enormous improvement. Much easier to fit and adjust and the bracket slips in and out without difficulty. Kryptonite rate it 8/10 but it has Sold Secure Gold status. Great lock for keeping on the bike and securing it for shopping!

    Having lost the key to my trusty Squire D-lock I was looking for a 30cm replacement. I really like Kryptonite locks but the older style bracket was a faff to fit and the lock would often jam in the bracket. The new style bracket is an enormous improvement. Much easier to fit and adjust and the bracket slips in and out without difficulty. Kryptonite rate it 8/10 but it has Sold Secure Gold status. Great lock for keeping on the bike and securing it for shopping!

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Sturdy Lock

    Looks and feels solid, it is heavy but that's the compromise for security, works very well with Kryptoflex cable. The 4ft cable is just long enough to loop through both wheels. Overall very pleased with it so far. Tredz had the best price

    Looks and feels solid, it is heavy but that's the compromise for security, works very well with Kryptoflex cable. The 4ft cable is just long enough to loop through both wheels. Overall very pleased with it so far. Tredz had the best price

    Close review
    4.8 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 4.5/5
    5
    Heavy, but very sturdy

    The lock feels well made and seems sure to stop all but the most determined thief. I'm also pleasantly supprised with the frame bracket, which holds the lock securely, even over very rough ground. Certainly exceeded my expectations. The only downside is the weight.

    The lock feels well made and seems sure to stop all but the most determined thief. I'm also pleasantly supprised with the frame bracket, which holds the lock securely, even over very rough ground. Certainly exceeded my expectations. The only downside is the weight.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Peace of Mind

    Great Security Feature!! Gives a real sense of satisfaction when you leave you bike. However, the attachment to mount it to the frame is pretty useless as it doesn't fit even my large framed bike.. Overall a great product.

    Great Security Feature!! Gives a real sense of satisfaction when you leave you bike. However, the attachment to mount it to the frame is pretty useless as it doesn't fit even my large framed bike.. Overall a great product.

    Close review
    4.7 out of 5
    Build Quality: 4.5/5
    Performance: 4.5/5
    Value For Money: 5/5
    4
    Heavy but confidence inspiring

    You certainly know about this lock when its in your bag but when you lock your bike up with it you walk away with confidence!

    You certainly know about this lock when its in your bag but when you lock your bike up with it you walk away with confidence!

    Close review
    4.5 out of 5
    Build Quality: 5/5
    Performance: 4/5
    Value For Money: 4.5/5
    5
    Great lock

    Great quality lock in a great price from Tredz. Orange in colour, what has the effect on potential thieves. Recommended.

    Great quality lock in a great price from Tredz. Orange in colour, what has the effect on potential thieves. Recommended.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Very confident with ths lock

    This is a very solid and capable lock. Purchased as a replacement for my old cable lock which lets face it, isnt very secure on it's own. The reveiws and brand name convinced me to purchase one. It is heavy ( I went for the shorter one) but don't let the weight put you off, it's a tough lock. Every time I walk away from the bike I feel confident I'll be riding back :) The orange is a brilliant detterent/warning to the cycle jackers. The mount/clamp I found pretty useless as it doesn't fit my bike to be able to remove the lock, it's a 20" frame as well. Might be the design of the bike where the cables run under the main tube! The silver mechinism on the lock for attatching to the bike can be easily removed if you wish, I just hang it over the handlebars. Measurments are internal. Had excellent service from the Tredz team, emailed them on a Saturday regarding measurments and received an email back on the following Sunday, thank you for that. Very good purchase which should offer maximum protection. 5* rating.

    This is a very solid and capable lock. Purchased as a replacement for my old cable lock which lets face it, isnt very secure on it's own. The reveiws and brand name convinced me to purchase one. It is heavy ( I went for the shorter one) but don't let the weight put you off, it's a tough lock. Every time I walk away from the bike I feel confident I'll be riding back :) The orange is a brilliant detterent/warning to the cycle jackers. The mount/clamp I found pretty useless as it doesn't fit my bike to be able to remove the lock, it's a 20" frame as well. Might be the design of the bike where the cables run under the main tube! The silver mechinism on the lock for attatching to the bike can be easily removed if you wish, I just hang it over the handlebars. Measurments are internal. Had excellent service from the Tredz team, emailed them on a Saturday regarding measurments and received an email back on the following Sunday, thank you for that. Very good purchase which should offer maximum protection. 5* rating.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Great sturdy D-lock

    This is one of the best D-locks I've used over the years. This is the longer version which is great for MTB frames (long or short available) and at the best price. The newer deep key design works well too. I wouldn't lock my bike up with anything else!

    This is one of the best D-locks I've used over the years. This is the longer version which is great for MTB frames (long or short available) and at the best price. The newer deep key design works well too. I wouldn't lock my bike up with anything else!

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Good Solid Lock

    I'm very glad with this lock only problem for me is that its ratling a liitle on bumpy road.

    I'm very glad with this lock only problem for me is that its ratling a liitle on bumpy road.

    Close review
    5 out of 5
    Build Quality: 4/5
    Performance: 5/5
    Value For Money: 5/5
    4
    Kryptonite Evolution 4 LS

    The lock feels solid enough, luckily it's not been tested for strength yet. The Tredz price and subsequent delivery were the best I could find and I can't complain about either. I don't know how common these comments will equally apply to other locks of the same type / price bracket but: The lock is heavy, about a fifth of the weight of the bike -though I suppose there has to be a trade off between strength and weight. The flexi bracket works fine, no rattles, working loose or lock jumping out. I bought the long length shackle and it fits (just) into a compact frame (Giant XL) but I've then found it impossible to carry water bottles etc on the frame as well -this is partly as the bike has external cabling on two of the 3 triangle sides. For bikes with internal cabling there are more fitting options so may be ok. Overall I'd recommend it if the weight /fitting aren't a problem for you

    The lock feels solid enough, luckily it's not been tested for strength yet. The Tredz price and subsequent delivery were the best I could find and I can't complain about either. I don't know how common these comments will equally apply to other locks of the same type / price bracket but: The lock is heavy, about a fifth of the weight of the bike -though I suppose there has to be a trade off between strength and weight. The flexi bracket works fine, no rattles, working loose or lock jumping out. I bought the long length shackle and it fits (just) into a compact frame (Giant XL) but I've then found it impossible to carry water bottles etc on the frame as well -this is partly as the bike has external cabling on two of the 3 triangle sides. For bikes with internal cabling there are more fitting options so may be ok. Overall I'd recommend it if the weight /fitting aren't a problem for you

    Close review
    4 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 4/5
    4
    Kryptonite Evolution Series 4 ULock with FlexFrame Bracket

    Build quality is not that great..Not so easy to unlock and very heavy.3 keys is a real plus

    Build quality is not that great..Not so easy to unlock and very heavy.3 keys is a real plus

    Close review
    4 out of 5
    Build Quality: 1/5
    Performance: 5/5
    Value For Money: 3/5
    5
    First purchase from Tredz

    Excellent service and stock.I searched the internet for days for this product and Tredz was the lowest price free delivery too! I'll definately be buying off them again

    Excellent service and stock.I searched the internet for days for this product and Tredz was the lowest price free delivery too! I'll definately be buying off them again

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Sssssturdy!

    Nice heavy duty lock. Hope it works as I got one bike already stolen but it was chained using a Squire lock which got cut like a piece of string

    Nice heavy duty lock. Hope it works as I got one bike already stolen but it was chained using a Squire lock which got cut like a piece of string

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    4
    Lock em up

    Does exactly what it says it does. I have several of these to secure the bike at work and home to heavy to carry long distances which gives me piece of mind that when I want to ride the bike is there. Quite a few of us use these and on several occasions the bikes that don't use them are easy pickings.

    Does exactly what it says it does. I have several of these to secure the bike at work and home to heavy to carry long distances which gives me piece of mind that when I want to ride the bike is there. Quite a few of us use these and on several occasions the bikes that don't use them are easy pickings.

    Close review
    4 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 4/5
    3
    Solid lock

    Its big and heavy and seems like it does a good as a lock. Let down by the cheap plastic keys and a terrible and unreliable led light on one of them.

    Its big and heavy and seems like it does a good as a lock. Let down by the cheap plastic keys and a terrible and unreliable led light on one of them.

    Close review
    3 out of 5
    Build Quality: 2/5
    Performance: 4/5
    Value For Money: 4/5
    5
    Rock Solid

    Very impressed with the quality of this lock feels very solid and hopefully unbrakeable. A great deterrent for your pride and joy.

    Very impressed with the quality of this lock feels very solid and hopefully unbrakeable. A great deterrent for your pride and joy.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Looks reliable

    I just literally got this hence the four star since I'm not sure. Seems totally strong which is why I bought it. My Abus silver rating got cut like butter. However cant hang it anywhere from bike as is too big and doesn't fit and is actually quite heavy...Have had problems with keys breaking inside locks with other brands hoping Kryptonite keys will be good! Any reviews on that would be good...worth checking reviews out for that in case...

    I just literally got this hence the four star since I'm not sure. Seems totally strong which is why I bought it. My Abus silver rating got cut like butter. However cant hang it anywhere from bike as is too big and doesn't fit and is actually quite heavy...Have had problems with keys breaking inside locks with other brands hoping Kryptonite keys will be good! Any reviews on that would be good...worth checking reviews out for that in case...

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 4/5
    Value For Money: 5/5
    5
    Solid lock

    This lock is well constructed and has a really solid feel. Comes with three keys the action of which are very smooth. It gives one a sense of security when leaving ones bike in the city.

    This lock is well constructed and has a really solid feel. Comes with three keys the action of which are very smooth. It gives one a sense of security when leaving ones bike in the city.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Kryptonite evolution series 4

    A heavy but stong lock leave your bike locked with confidence. Make sure if you have a cable with the lock as well stow it away mine some how unwound and I lost it out of my panniers.

    A heavy but stong lock leave your bike locked with confidence. Make sure if you have a cable with the lock as well stow it away mine some how unwound and I lost it out of my panniers.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 4/5
    4
    Good bike lock

    Keeps my bike safe and secure from people trying to get into it. Feel like I can bike in town safely.

    Keeps my bike safe and secure from people trying to get into it. Feel like I can bike in town safely.

    Close review
    4 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Great lock

    This lock is very strong and secure. I already have the same lock for another bike and would recommend them for quality.

    This lock is very strong and secure. I already have the same lock for another bike and would recommend them for quality.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    4
    Excellent Bike Security

    The lock is solid and looks safe and secure. It has good length although I would prefer it slightly wider for wider posts. It comes with 3 keys which is great. I don't find the weight too much once its in my pannier although other people have complained about it.

    The lock is solid and looks safe and secure. It has good length although I would prefer it slightly wider for wider posts. It comes with 3 keys which is great. I don't find the weight too much once its in my pannier although other people have complained about it.

    Close review
    4 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Kryptonite Evolution Series 4 U Lock

    Top quality lock a must for anybody that cares about their bicycle.

    Top quality lock a must for anybody that cares about their bicycle.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Great but too heavy

    I think its a great sturdy lock but personally I find it too heavy for carrying around.

    I think its a great sturdy lock but personally I find it too heavy for carrying around.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Very good

    Good quality with a heavy sturdy design. 3 keys is excellent some other locks only come with 2. Very fast delivery

    Good quality with a heavy sturdy design. 3 keys is excellent some other locks only come with 2. Very fast delivery

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Great item

    Great item bought at a good price as well discounted by Tredz. I have no problems leaving my bike outside.

    Great item bought at a good price as well discounted by Tredz. I have no problems leaving my bike outside.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Robust security for your bike

    I wanted a strong U lock with a shank length that allowed you to fix the frame and rear wheel to a secure object and this fits the bill.The bright colouring makes it clear the bike is secured.Although not a backup for insurance the 1 year policy associated with the lock adds to your confidence in the product.

    I wanted a strong U lock with a shank length that allowed you to fix the frame and rear wheel to a secure object and this fits the bill.The bright colouring makes it clear the bike is secured.Although not a backup for insurance the 1 year policy associated with the lock adds to your confidence in the product.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Solid Lock

    This lock is exceptionally strong for the money has a very impressive tonnage pull breaking point.

    This lock is exceptionally strong for the money has a very impressive tonnage pull breaking point.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 4/5
    Value For Money: 5/5
    5
    Great lock great price

    Excellent lock great build quality easy to fit fast delivery great stuff!

    Excellent lock great build quality easy to fit fast delivery great stuff!

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    4
    Excellent one

    Seems strong and unbreakable it can prevent a thief from trying to steal your bike

    Seems strong and unbreakable it can prevent a thief from trying to steal your bike

    Close review
    4 out of 5
    Build Quality: 4/5
    Performance: 4/5
    Value For Money: 4/5
    5
    Mr

    Very good item very security good quality excellent!!!!!

    Very good item very security good quality excellent!!!!!

    Close review
    5 out of 5
    Build Quality: 4/5
    Performance: 4/5
    Value For Money: 4/5
    5
    Solid

    Solid very heavy so I need to get another one to leave at work and one for home.

    Solid very heavy so I need to get another one to leave at work and one for home.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Kryptoflex evo 4 u lock

    Looks and feels solid. Smooth locking action makes fitting a breeze. Works very well with Kryptoflex cable. haven't bothered with FlexFrame fixing bracket so cant comment on its efficacy. Overall very pleased with it so far.

    Looks and feels solid. Smooth locking action makes fitting a breeze. Works very well with Kryptoflex cable. haven't bothered with FlexFrame fixing bracket so cant comment on its efficacy. Overall very pleased with it so far.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    5
    Very strong cheapest price for this lock on the net

    I bought this lock because not only will kryptonite kind of insure it but because it is very strong and deters theives. its a shame it didn't come with the kryptoflex cable otherwise it would have been perfect

    I bought this lock because not only will kryptonite kind of insure it but because it is very strong and deters theives. its a shame it didn't come with the kryptoflex cable otherwise it would have been perfect

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    4
    A great lock

    This is a great lock. Its kept my bike safe across London and is not too heavy considering its rating. The plastic bracket could be a smoother operation but it does the job.

    This is a great lock. Its kept my bike safe across London and is not too heavy considering its rating. The plastic bracket could be a smoother operation but it does the job.

    Close review
    4 out of 5
    Build Quality: 4/5
    Performance: 5/5
    Value For Money: 4/5
    5
    Kryptonite ulock

    Solid well made and easy to lockunlock. Very pleased with it so far.

    Solid well made and easy to lockunlock. Very pleased with it so far.

    Close review
    5 out of 5
    Build Quality: 5/5
    Performance: 5/5
    Value For Money: 5/5
    4
    Bike lock

    It looks like a good bike lock so hopefully it is It looks like a good bike lock so hopefully it is It looks like a good bike lock so hopefully it is

    It looks like a good bike lock so hopefully it is It looks like a good bike lock so hopefully it is It looks like a good bike lock so hopefully it is

    Close review
    4 out of 5
    Build Quality: 4/5
    Performance: 4/5
    Value For Money: 4/5
    4
    Heavy solid reliable

    A good sturdy lock. Needs oiling otherwise it can seize up. Key doesn't seem the strongest I've ever seen but its worked for two years regardless!

    A good sturdy lock. Needs oiling otherwise it can seize up. Key doesn't seem the strongest I've ever seen but its worked for two years regardless!

    Close review
    4 out of 5
    Build Quality: 4/5
    Performance: 4/5
    Value For Money: 4/5

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