1

I have a Kryptonite U-lock and my key doesn't seem to be working, I'm not sure if the key is broken or the U-lock. How do I unlock my bike? Kryptonite isn't open and both the key and lock worked an hour before. (I have a theory that moisture inside the lock froze.)

  • 2
    Have a theory of hit it with a hair drier – paparazzo Feb 24 '15 at 0:19
  • Tried WD40? Both on the key and the lock. – Elmer Feb 24 '15 at 1:00
  • 1
    I'd try the hair dryer as well. Lock deicer may help too. Using graphite in the lock after you get it free is a good idea after warming it up and drying it out. – Batman Feb 24 '15 at 2:45
2

This happened to me with a Kryptonite Evolution lock. I locked it, went for lunch, but afterwards the key just wouldn't unlock. After hours of oil, poking bits of wire, screwdriver waggles, help from strangers, I gave up. I tried again the next day, and gave up again.

In the end, I had to cut the lock with an angle grinder. Took 20 seconds tops. I took it back to the bike shop and they replaced it immediately. They said they replace about one a year on warranty.

They also recommended putting a bit of oil in the lock each month to keep it working smoothly.

2

I used deicer and WD-40. I think the WD-40 is what freed it enough for me to force it open. Then I wiped off a rust colored gooey film that it seemed to be getting stuck on.

  • Glad it didn't need an angle grinder! – Hugo Feb 25 '15 at 13:55
0

Things I have tried with success on dodgy locks.

I found the angle of the lock makes more of a difference. Heaviest part towards the floor seemed more successful, though another lock like to be horizontal. There are some balls/bolts that pull in on lock. The angle can help assist

Pushing key in a varying depths and wiggling to free the lock.

Load of wd-40.

Pushing and pulling the Lock part while trying the key. Ensure the bolts are binding better.

Cool it (i.e waited till night)

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.