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Kryptonite KryptoLok Series 2 Std U-lock with 4 foot Kryptoflex cable

4.3 out of 5 stars 1,363 customer reviews
| 59 answered questions

RRP: £34.99
Price: £24.37 & FREE Delivery in the UK. Details
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20 new from £20.71
Black
Single Lock Size Chart
  • Lock package containing U-lock and bonus braided steel flex cable
  • Reinforced sleeve over crossbar and cylinder provides enhanced security protection
  • Shackle clearance measures 102 mm width by 229 mm depth
  • 13 mm Shackle diameter

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Frequently Bought Together

  • Kryptonite KryptoLok Series 2 Std U-lock with 4 foot Kryptoflex cable
  • +
  • AWE® AWEBrightTM 1 x Super Bright Front LED & 0.5W x 2 Rear LED's Bicycle Light Set 140 Lumens
Total price: £39.36
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Colour: Black | Size: Single Lock

Product details

  • Boxed-product Weight: 3 Kg
  • Delivery Destinations: Visit the Delivery Destinations Help page to see where this item can be delivered.
    Find out more about our Delivery Rates and Returns Policy
  • ASIN: B00GZ2D7WA
  • Date first available at Amazon.co.uk: 28 Nov. 2013
  • Average Customer Review: 4.3 out of 5 stars  See all reviews (1,363 customer reviews)
  • Amazon Bestsellers Rank: 48 in Sports & Outdoors (See Top 100 in Sports & Outdoors)

Product Description

Versatile lock package containing U-lock and a braided steel flex
Bicycle security for moderate to high crime areas, with a standard length shackle
13 mm hardened Kryptonium steel shackle
Patented deadbolt locking mechanism for extensive holding power
High security disc style cylinder
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
Patented, easy to use, high security Bent Foot design
Anti-Rattle bumpers keeps the shackle snug against the crossbar and prevent unnecessary noise
2 keys
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
Vinyl coated and weatherproof
Kryptoflex braided steel cable for locking up 2.9 cm x 10.2 cm x 13 mm

as a secondary deterrent

U-lock dimensions: 2


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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Colour Name: BlackSize: Single Lock
They almost managed to steal my bike with this lock. I guess they spent some time trying to cut it out when somebody stopped them or they simply just gave up. Attached some photos with it now. I will definitely buy it again !
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Colour Name: BlackSize: Single Lock Verified Purchase
Pros

- The company will refund the cost of the bike (up to £800) if you register your lock and your bike with them on their website if your bike is stolen.
- Lock feels substantial and will certainly deter the opportunist thief.
- Solid cable, which ensures more complete protection for the bike, allowing you to tie in the front wheel too.
- Affordable - well-priced for the protection it offers.

Cons

- Lock/cable is fairly heavy to carry around.
- Key lock can be a bit fiddly to operate: I worry a little that in the future this could lead to difficulties with being able to unlock it but it will probably be fine!
6 Comments 128 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Colour Name: BlackSize: Single Lock Verified Purchase
I just want to add:
* Mounting was quite simple and appears to be solid; see attached picture.
* Cable is long enough to go through front wheel and back to the U-lock on the rear wheel

So far I am really happy :)
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Colour Name: BlackSize: Single Lock
I was inspired to write a review of this lock because I've only had it a week and it's already stopped my bike from being nicked! There's no higher praise for a lock than that. They had managed to cut through the black coating around the shackle but that was as far as they got - they broke the front gear shifter of my bike in the process but couldn't shift old Krypto. Perfect.

So this lock is definitely secure (8/12 on their scale) and the D/U is a good length and width for going round front or back wheel plus frame. Cable is a great addition, I use it to secure a quick-release front wheel whilst the D is around back wheel and seat tube.

You could argue the lock is fairly heavy but that's only because of it's quality. All in all I'm 100% satisfied with this lock, highly recommend.
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Colour Name: BlackSize: Single Lock
I used this lock to take my mountain bike all over the place, and I have evidence that it does the job.

My bag got stolen, which had my bike locks keys in it. Due to this, my bike was locked up in a dodgy part of town, and I had no way of retrieving my bike other than cutting it lose.

Tools we used: Fireman bolt cutters, handsaw, a van, a saw.

All of those failed. The bolt cutters left about an impressive mark on it as a toddler would if it chewed it. The handsaw did nothing, the van did nothing, the saw did nothing.

In the end we had to use a mains powered angle grinder and a diamond level saw disk, even then it took a good 15 minutes and the diamond level saw disk was in complete tatters, and had to be thrown away.

Not bad for £20. Although the difficulty was with the MAIN LOCK. The extra CABLE came off pretty easily.
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Colour Name: BlackSize: Single Lock Verified Purchase
Bought two of these for my girlfriend and I.And guess what? Same key opens both locks.
Still think your bike is safe?
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By JackJack HALL OF FAMETOP 10 REVIEWER on 20 Feb. 2015
Colour Name: BlackSize: Single Lock Verified Purchase
I bought this lock on a recommendation from The Wirecutter group test. My previous bike lock was a combination+cable lock. I only found out how rubbish it was when my bike got stolen. So, for my new bike, I wanted to be sure of getting the best lock.

Frankly, if it wasn't for the recommendation, I would never have looked at a D-Lock like this, since I had assumed they were too heavy to carry around. What I didn't realise is that it comes with a handy adapter that allows you to mount the lock to your bike frame when not in use. This works very well for me - it holds the lock very securely. No wobble, no rattle, and you really don't notice it's there until you need it.

Some reviewers on this page have said they found the adapter impossible to fit. I must admit that I struggled at first, because I am a man and I don't like to read instructions. When I eventually did read the instructions, it all became clear, and I had the adapter fitted in under 5 minutes (it's a plastic mount attached to a nylon tether; you loop the tether through the mount, and tighten an allen nut to secure the tether. The secret is to push down the plastic against the frame as firmly as possible so that the nut engages - then it's easy).

Also, there are 2 keys included (just in case you lose one). I'd recommend storing the spare one somewhere safe!

The only quibble I have is with the 'insurance'. The fine print is so full of exclusions that it's basically worthless. If you do a little Googling, you'll find numerous stories of the company not paying out in the event of theft. But search a little further, and you'll see videos of just how much noise and effort it takes to get through this lock - rest assured that *nobody* is going to cut this lock without attracting a *lot* of attention.
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By PPS076 HALL OF FAMETOP 10 REVIEWER on 20 Sept. 2014
Colour Name: BlackSize: Single Lock
I decided to buy 2 of these for our new mountain bikes because I had heard a lot of positive things about the product from my brother in law who is a mountain bike enthusiast.

Given that top quality ones can range from £50-£100 I didn't expect that much from the product given the low price tag however when I removed them from the packing it was evident that they were made of high quality material that's fit for purpose.

They are reasonably easy to apply and to take off but do take several minutes to do so which is common with any lock of this design. We have used them a considerable amount of times in areas that you would not choose to leave your bikes but we haven't had them stolen although certain thieves have tried which was evident with the knife punctures in both tyres.

I recently went shopping to a 'high end' specialised bike store with my brother in law and he showed me the £50-£100 locks that were available. Yes they were very high quality but even the £100 ones were not that much better than this product.

I have now been using the product for a considerable amount of time and have not experienced any problems with it. It has performed the desired task to an exceptionally high standard and I would therefore highly recommend it.

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Colour: Black | Size: Single Lock