Kryptonite Kryptolok Standard 12.7mm U-Lock Bicycle Lock with FlexFrame-U Bracket

from Gilbert

Great lock - a good combination of security and weight. I would use for either every-day-not-too-expensive bicycles, or alternatively, if you're not in a high crime area, this lock can be an easy deterrent. Additionally, the U shape is useful for locking things you don't want others accessing - i...

from brandyc626

This lock is very heavy Duty. I don’t have to worry about leaving my sons bike on a regular lock because this one is double the strength. Easy to use and take off. I recommend this to family and they love it

from Niecey

Kryptonite Kryptolok Standard 12.7mm U-Lock Bicycle Lock with FlexFrame-U Bracket is a great Anti-theft lock. It's strong and sturdy. Comes with two spare keys. And has a Lifetime warranty.

from SuperAmmi

The Kryptonite KryptoLok with FlexFrame U Bracket is a sturdy U-lock for bicycles or motorcycles. U-Locks are great anti-theft and protective locks. It is the largest and heaviest U-lock I have used on my bikes and feels quite sturdy and not at all clunky to lock. It also has a keyhole cover. I w...

from Renee

The U-lock is amazing. It’s really secure and different than any other lock you would use. It’s heavy and keeps my bikes safe especially whenever my son needs to use it to prevent someone from taking his bike. The long neck of the lock can wrap around creating a secure lock. It comes with 2 keys ...