Kryptonite Evolution Series 4 Disc Lock

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Tredz FAQ: Which type of bike lock do I need?

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D-Lock Guide
Delivery & Guarantee

Product Description

Key Features:
- Disc lock with 14 mm hardened MAX-Performance steel shackle giving resistance to cutting and leverage attacks
- Double deadbolt locking mechanism for extensive holding power
- High security, disc style cylinder with more then a million key variations
- Reinforced anti-drill, anti-pull cylinder protection system
- Sliding dustcover protects and extends cylinder life
- 3 Keys: one lighted with high intensity bulb and replaceable battery
- Includes carrying pouch and disc lock reminder
- Part of the Kryptonite Key Safe programme
- Colour: orange with black graphics
- Dimensions: 48 mm x 54 mm
- Weight: 0.91 kg
- Approved to Thatcham CAT3
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Overview

Size

Locking mechanism

Construction

Mounts

Frame Protection
Overview

For use in medium to high crime areas

A D-Lock (also known as a U-Lock) is the most practical bike lock you can get for peace of mind when you’re at the shops or in work all day.

D-Locks are ideal for bike security as they offer strong protection against a range of attacks. While some of these locks will be heavy, they are much more portable than a chain lock and far tougher than a cable lock. D Locks are very stiff meaning they’re easy to fit around your bike and a stationary object.

Most D-Locks come in two parts. You have the shackle made of steel or hardened steel with a diameter up to 18mm. The crossbar contains the locking mechanism and you slide the shackle into the bar and turn the key to fix it in place.

Size

D-Lock Size

A standard D-Lock will easily fit around your bike and normal bike racks. If you have a particularly wide framed bike you can get wider and longer shackles. Alternatively, there is also a range of mini D-Locks are that specifically for use just with a standard bike rack. You won’t be able to fit your bike around a lamppost with a mini.

For security, it is best to get a D-Lock which will fit your frame and stationary object without leaving too much internal space. A common way for thieves to defeat your D-Lock is by slipping another object like a crowbar inside the shackle and leveraging with enough force to break it open.

Shackle Diameter

When choosing a D-Lock, the thicker the shackle diameter is, the more secure it is (especially against bolt cutters). However, the trade off is weight. Some very sturdy D-Locks can weigh over 2.5kg. One tip is to lock your bike high on the frame and off the ground to make it harder to use bolt cutters.

13mm & Under:

Under 13mm shackles can be cropped with most standard bolt cutters while some determination.

The quality of steel used in the shackle can increase the time this takes. Ideal for quick visits to the shops.

13mm – 16mm:

At this diameter it becomes much harder to crop a D-Lock with a standard bolt cutter.

Good for locking to the bike rack outside the office.

16mm & Over:

With a shackle this burly only the largest bolt cutter jaws with sustained effort with crack through.

It’s unlikely a thief will have the time or tools to cut through. Great for locking your bike overnight.

Locking Mechanism

Deadbolt Locking

Most D-Locks will now use a deadbolt locking mechanism. A deadbolt cannot be moved to the open position except by rotating the key.

Look for a double deadbolt for enhanced security. This means there is a locking bolt on both sides of the crossbar. Locking the shackle on both entry points greatly improves twisting and cutting resistance. Even if a thief cuts through one end of the shackle, it’ll be much harder to twist the shackle out of position.

Some brands even offer quadruple deadbolt systems which lock the shackle to the crossbar in four places for maximum resistance.

Construction

Lock Material

Almost all D Lock shackles and locking mechanisms are built out of steel. However, some locks will be constructed from hardened steel. By tempering steel if becomes harder and less brittle making it much tougher to cut through.

Sold Secure Rated

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, UK independent rating system for bike locks.

Sold Secure Bronze

Coverage: Up to £500

Sold Secure Silver

Coverage: Up to £1,000

Sold Secure Gold

Coverage: Over £1,000

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.

These values vary between insurance providers so check the terms and conditions of your provider.

Mounts

If you commute to work or use your bike daily, then having a mount to fix your lock to your bike frame is a great way to improve portability. Many brands will include easy to use frame mounts with their D-Locks but check the product description first.

Frame Protection

D-Locks with vinyl covers, moulded end caps and rubber coatings all ensure that your bike frame is safe from scratches and damage to your paintwork.

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UK Delivery Information

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 on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

Click here for more UK and international delivery information.

Returns & Warranty

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).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.