Kryptonite Transit FlexFrame-U Bracket Bike Lock Mount, Lightweight Mounting Bracket for Kryptonite U-Locks 13mm-16mm Shackles, Bicycle Attachment Accessory

I’ve had a Kryptonite lock with this type of bracket for a few years and it’s been fine. I needed this one so that I could transfer my lock between bikes. In the pack there is a little slip stuck to one of the parts with a QR code that you can use to access installation instructions. These are pretty good but if you do an internet search for ‘Kryptonite Transit FlexFrame-U Bracket Installation’ you’ll find a useful video. The principle of how the bracket holds on to the frame is quite simple, but if you approached the set of parts in the pack intuitively without accessing instructions or a video you might be a bit flummoxed. My lock is a ‘Kryptonite Kryptolok Standard Bicycle U-Lock’. By the time you’ve allowed space to lift the lock out of the bracket the choice of position within the bike frame is quite limited. I don’t mind that I don’t have space for a water bottle cage but if that is a concern you can fit it in various offset positions so that it sits outside the frame rather than within it

Easy to install and feels sturdy. Worked with my Kryptonite Series 2 lock (despite other reviewers saying it doesn’t). Probably a bit overpriced but ultimately doesn’t the job!

I needed a cheap solution to hold my old u-lock on the frame of the bike, since I didn't want to spend more than £50 on a foldable one with similar anti-theft quality. It took some DIY and imagination as you can see, but I got there in the end: - I had to cut off the rubber protection of the lock in order for it to fit on the larger of the 2 fittings. - by doing that, the fitting was a bit loose and it would swing with the pedalling, so I bought a cheap velcro holder on Decathlon (£2) and use it to hold everything tight. Sorted. Now I only have to wait for the old London tradition of seeing my bike stolen with malice and easiness and just give up and start walking everywhere (I hate public transportation).

Worked perfectly with my existing Krptolok so that I can swap it between 2 bikes. Fitting took seconds and very secure fit.

Spent a while setting this up on the bike, getting it perfectly in place and all secure. All good so far. The I put my lock in it. Great. Remove the lock? No. It's well and truly stuck. This clamp is badly made and doesn't fit. I eventually get my lock out of this mount with brute force and a hammer (scraping paint off both my lock and my bike in the process because of the force required), great! Maybe it's my mistake, maybe I should have swapped the barrel with the clamp from my lock with one of the new ones in the pack the mount comes with. Both of them don't fit properly in the mount either, both jammed and wouldn't come out no matter how hard I pulled on it or how hard I pushed the little button. I see now that other people have reviewed with the same issues. This is obviously just a badly made piece of garbage. It's going back to Amazon and I'll just replace my whole D lock with another brand and won't be using Kryptonite again.

Great and very easy to install- unfortunately it is not suitable for the Kryptonite New York Lock

The nylon strap just doesnt live up to the plastic one it replaces. I could absolutely stick the old mount to the frame so it wouldnt move, this one always has play in it.

Seen a lot of mixed reviews before buying. Just set mine up and am going to try clear things up. - This bike lock bracket/holder comes with 2 “clasps”, one small, one big, each can be tightened using the provided Allen key. Meaning there should be no problem with U lock/D lock capability - The holder/bracket for your bike is again adjustable, and can be tightened using the Allen key, it doesn’t rattle but isn’t “rock solid” as you might hope. Does the job - There is very little instructions provided, so takes a bit of time to figure out. - The mechanism to remove and put the lock back is a standard “clip in”, no qualms so far. Hope this helps you all trying to make a decision. Does it work? Yes. Will it fit your bike and lock? Unless yours is ginormous, Yes. Is it what I expect for Kryptonite? Slightly subpar but does the job 🙂