The OnGuard Mastiff chain combi lock is a flexible and versatile bike lock to keep your pride and joy secure in public. Titanium reinforced steel chain links are strong against sawing and cutting attacks, as well as bolt cutters.
A user settable combination gives the Mastiff bike lock up to 10,000 variations to deter opportunistic code breakers. You also don’t need to worry about losing keys or forgetting your keys. To protect your bike frame from scratching there is a durable chain cover.
Larger and chunkier than expected, but excellent quality and value for money. Very easy to use , feels very secure and trustworthy.
Larger and chunkier than expected, but excellent quality and value for money. Very easy to use , feels very secure and trustworthy.Close review
I have both the D locker and the chain and I find it easier to lock my bike with the chain as it wraps around the wheel and the frame very easily. I also find the code very convenient when compared to a key. The only thing is that it is slightly heavy to carry but as I keep it in the place/home this is not a minus for me.
I have both the D locker and the chain and I find it easier to lock my bike with the chain as it wraps around the wheel and the frame very easily. I also find the code very convenient when compared to a key. The only thing is that it is slightly heavy to carry but as I keep it in the place/home this is not a minus for me.Close review
my son had his previous bike stolen, so I wanted something secure and strong enough to keep my mind at peace. Yes, I am very happy with this product and recommend it.
my son had his previous bike stolen, so I wanted something secure and strong enough to keep my mind at peace. Yes, I am very happy with this product and recommend it.Close review
Cable Lock | Use in low crime areas
These are the lightest bike locks. They’re very flexible and easy to carry in your pocket or on your frame. Great as a visual deterrent or secondary lock to fix quick release components to your frame.
Combination Lock | Use in low crime areas
These are cable locks with a 3 or 4-digit combination rather than a key lock. They are great if you don't want to worry about forgetting keys.
Chain Lock | Use in medium/high crime areas
Chain locks are versatile. Thick chain links are great against bolt cutters. You can secure your bike to a range of bulky and unusual objects.
D-Lock | Use in medium/high crime areas
D-locks are strong and often made from hardened steel. You get 360-degree protection for your frame. Locking mechanisms can resist picking and drilling while the D shaping makes leverage style attacks difficult.
Ground anchor | Use in high crime areas
Ground anchors are immovable platforms you fix to your garage floor or wall. When used with a strong chain lock you can fix your frame to the anchor. These offer the best protection for home storage.
In general, the stronger a bike lock, the heavier it will be.
Cable / Combo locks
These range from around 400g up to 1.25kg depending on the thickness and material used in the twisted cable. These are the lightest bike locks for easy transport.
Chain locks range from around 1kg up to 7kg for the thickest and toughest chain locks. Choose a mid-range weight if you're commuting daily to blend strength and weight.
D-locks tend to be 1kg up to 2.5kgs and are more compact for daily use than a chunky chain lock.
A great way to determine the quality of a bike lock is to see if it is Sold Secure Rated. This is a third party, independent rating system.
An approved lock is graded as Gold, Silver or Bronze. The rating is chosen by how long it takes to break the lock and the tools needed to break it.
If you're planning on insuring your bike, many insurers will state you need a Sold Secure rated lock to make a successful claim.
Typically a bronze rating covers a bike up to the value of £500, silver up to £1,000 and gold for any bike worth over £1,000.
These values vary between insurance providers so check the terms and conditions of your provider.
We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE to mainland UK, regardless of the size and value.
Please note: bulky products and bikes shipped to outlying UK regions are excluded from free shipping - Click here for more info.
Christmas is one of the busiest time of year for us at Tredz. We will try our best to get your products delivered before Christmas. To help you, please see our last postage dates for first class and 24 hour courier services below:
Any order dispatched on the 22nd & 23rd December will be delivered between 28th December and 30th December.
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It’s easy to return a product with our 365 day, hassle free returns.
We will give you a full refund or exchange on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).
For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.
For more information please visit our Returns & Warranty page.