Kryptonite KryptoLok Series 2 ATB

4.0 stars
 (2 Reviews)
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The KryptoLok Series 2 ATB U-lock’s extra width makes this the standard for mountain bike security. With a reinforced steel shield over the crossbar and cylinder, enhanced security to internal functions comes standard. The 13mm hardened Performance steel shackle resists cutting and leverage attacks, while the high-security disc cylinder resists picks and drills. Two “I” keys, one of which features an LED light for locking and unlocking in the dark, are included with this reliable U-lock. The KryptoLok Series 2 ATB is 5 x 9-inches and has an anti-theft protection offer of $1,500.

Features & Info

Key Safe Program

Kryptonite's Key Safe Program is an easy way to ensure you always have access to your lock's capabilities. Simply register your key number with Kryptonite and if you lose your keys, your first set of replacement keys are free!

Consumer Reviews

4.0 stars

(2 reviews)

100% of respondents would recommend this to a friend.


  • Durable  (2)
  • Ultra strong  (2)
  • Easy to Use 


  • Rusts 
  • Slips when riding 

Best Uses

  • City bikes  (2)
  • Mountain bikes  (2)
  • Road bikes  (2)

Mar 11, 2015

Outstanding Lock

Durable, Ultra Strong
Best Uses:
Road Bikes, Mountain Bikes, City Bikes
I use this product all the time in daily. It has not let me down.
by Hyghlander from Portland Area

Jun 29, 2008

Pretty Good, Worth The Money? (Maybe)

Durable, Easy to Use, Ultra Strong
Slips when riding
Best Uses:
City Bikes, Road Bikes, Mountain Bikes
for the money this is a great lock but the only thing thats wrong with it is no matter how hard you tighten the strap the lock over time shifts a little so just watch for that and fix it before it hits the tire, over all great lock
by Bob from San Jose, Ca