• Online:
  • URL for this product:
  • From the U.S. and CanadaCall 1-800-426-4840
  • Mon. through Sun., 4 a.m. through 11 p.m. PT.
  • InternationalCall 1-253-891-2500
  • Mon. through Sun., 4 a.m. through 11 p.m. PT. English language only.
Kryptonite KryptoLok Series 2 U-Lock with 4\' Flex Cable

    Kryptonite KryptoLok Series 2 U-Lock with 4' Flex Cable

    This Kryptonite KryptoLok Series 2 U-lock with Flex cable is a convenient combination for deterring bike theft. See details

    • $48.95

    Item # 833105

    REI Members get back an estimated $ 4.90 on this item as part of their annual member refund.

    The REI Member Dividend

    The REI dividend is a unique benefit of membership in the REI co-op. It's comprised of your member refund—typically 10% back on eligible purchases—and/or your REI Visa® card rebates.

    Each March, active REI members and REI Visa cardholders who earned a rebate receive a refund in the form of an annual dividend notice.

    Only active members receive annual dividend notices. To maintain your active status as an REI member, you need to make net merchandise or shipping purchases of at least $10 per year, unless you joined that year. Member numbers are issued in one name and only that person receives the member refund. Your number can be used by others in your family, but it cannot be transferred to someone else.

    Questions? Call us at 1-800-426-4840 for more about your dividend or its redemption.

    Learn more

    This Kryptonite KryptoLok Series 2 U-lock with Flex cable is a convenient combination for deterring bike theft.

    Product size and color

    This Kryptonite KryptoLok Series 2 U-lock with Flex cable is a convenient combination for deterring bike theft.

    • 100% Satisfaction Guaranteed
    • Gear and Advice You Can Trust

    Orders of $50 or more ship for free.
    Learn more

    To view videos or use the zoom feature on REI's websites, please download the latest version of Adobe Flash Player.


    This Kryptonite KryptoLok Series 2 U-lock with Flex cable is a convenient combination for deterring bike theft.

    • Stout 13mm hardened steel shackle resists cutting and leverage attacks; vinyl coating offers protection for your bike's finish
    • 4 ft. KryptoFlex™ 10mm-thick braided steel cable provides good cut resistance for securing a front wheel or accessories
    • Reinforced, hardened crossbar design provides increased protection
    • Disc-style cylinder delivers a high level of security; rotating dust cover helps protect cylinder
    • Bumpers reduce rattling noise while you're transporting the U-lock
    • Comes with 2 stainless steel keys and mounting bracket along with the U-lock and cable
    • Eligible for Key Safe Program; register your key number with Kryptonite for easy replacement of lost or worn keys for a minimal fee
    • Kryptonite rates this lock combo a 6 on their 10-point system with 1 being simple, deterrent security and 10 being extreme security


    Item 833105

    Members: earn a
    $20 bonus card

    When you spend $100 April 14—29

    Single-use bonus card redeemable by
    REI members MAY 2—12, 2014.

    Not a member? Join Now!
    Add to Cart

    REI Membership

    Kryptonite KryptoLok Series 2 U-Lock with 4' Flex Cable Specs
    Best use
    Combo lock
    Key lock
    13 millimeters
    Hardened steel / steel cable
    9 x 4 inches / 48 in. cable
    3 lbs. 10 oz.
    Lock style
    Lock type
    Lock thickness (mm)

    Kryptonite KryptoLok Series 2 U-Lock with 4' Flex Cable

    Loading Ratings & Reviews...

    Kryptonite KryptoLok Series 2 U-Lock with 4' Flex Cableis rated4.375out of5by8.
    Rated5out of5byfromExcellent LockI carry this lock in my backpack, it's solid, and the extra weight doesn't bother me that much. The lock and key mechanism is easy to use once you get the hang of it. Once, I saw Superman trying to break my lock and steal my bike, he couldn't do it. Another time, I saw Bizarro trying to get at it, he failed too.
    Date published: 2014-02-06
    Rated5out of5byfromHasn't Failed MeI use this lock daily to secure my bike in a big city with high theft risk and it hasn't failed me. I especially appreciate the mounting options flexibility so I can mount it out of the way were I have room.
    Date published: 2013-10-03
    Rated4out of5byfromU-lock safeoverall i feel safe with this on my bike and new tires. with the included hardware it is also easy to carry around on the bike frame. the only challenge sometimes is finding a fixed object that it can fit around. only time will tell if the bike stays or goes to the seedy underworld of bike theft like so many others. pleased so far!
    Date published: 2013-10-01
    Rated5out of5byfromGreat everyday security in city & suburbThis is my everyday security while city and suburban biking. I would get two for over-night security. Kryptonite rates this lock & cable combo a 6 on their 10 point system. Look on Youtube for easy and proper clamp installation. Remember to register your key on Kryponite's website for free replacement if lost.
    Date published: 2013-09-02
    Rated4out of5byfromit works great so fargood fot the price, convenient since is 2 in one
    Date published: 2013-06-13
    Rated4out of5byfromGreat lock w/ Flex Frame BracketI use this on a 700c Xtracycle (long tail). The 4 ft flex cable is just long enough to loop through my rear tire (on an Xtracycle the rear wheel is back 15" further than most bikes), wienough length to get it to the U Lock which i usually have securing my front wheel through the downtube, and to some stationary pole or other secure object. If I'm only running in and out of a place, and it's a generally safe neighborhood, i'll usually just use the U lock on the frame and to an object. But if i'm unsure, i'll make sure to secure both wheels as well. Kryptonite uses two kinds of brackets. The flex frame bracket is much more versatile, and i recommend it. I've mounted it to seat stays, pannier racks, and it is very solid. I love this lock. It gives me peace of mind when I make a 2AM grocery run in a bad neighborhood, or if I've got to leave my bike parked overnight downtown at my place of employment. With my old cable/combination lock , I'd constantly want to check on my bike as I knew it wasn't nearly as secure. With this lock, I no longer do that.
    Date published: 2013-05-18
    Rated4out of5byfromGreat deterrent.I use this for my hybrid bike for occasional rides around the city near my home. The mount for the u-lock was a bit tricky trying to find a place it would fit on the frame with the u-lock in it. It ended up on the shaft for the seat post with the lock sitting along the left side of the rear wheel. The end sticks out a little bit, but is still flat enough that my foot doesn't hit it when pedaling. The cable has a velcro strap that's long enough to wrap it around your handlebar when riding. Overall, this is a great deterrent. There is no evidence that anyone has ever tried to steal my bike. However, my bike wasn't expensive/fancy, I only lock it up in well-lit public areas, and I never leave it overnight. If you don't fall under those conditions, I'd get 2 u-locks instead because the steel cable won't help against thieves with bolt cutters. I really wish a lock manufacturer would make a 2 u-lock set with both locks using the same key. I couldn't find 2 u-locks keyed the same which is why I bought this one. In addition, it comes in handy on my RV to keep anyone from trying to steal my propane bottles. I can lock them to the hitch.
    Date published: 2013-05-02
    Rated4out of5byfromBike SavedThis Kryptonite U-Lock set Proved Effective. BE AWARE Cable can be CUT After my last cable being cut i now have 2 long shank u-Locks making it very versitale to secure the Bike, Thieves recently cut the new cable, but were Stopped Cold with the Dual U-Locks. the Cable is Some value to Lock more Secure, but Depend on the U-Lock. College Bike 2 Not Stolen :)
    Date published: 2012-10-09

    Ask a question and have it answered by REI product experts and fellow outdoor enthusiasts. Need immediate assistance? Use Live Help.

    Loading Questions & Answers...

    How are we doing? Give us feedback on this page.

    FREE SHIPPING With $50 minimum purchase

    MEMBERS, EARN A $20 BONUS CARD! When you spend $100 April 14-29. Single-use bonus card redeemable May 2-12. Details
    • Join REI today!
    • REI Membership
    • REI member benefits include an annual refund (typically 10% on eligible purchases).
    • Join REI today!
    • Sign up for REI Gearmail®
    • and get 15% off selected items!
    • Store Locator
    • Locate an REI store near you.
    • Find a Store
    © 2014 Recreational Equipment, Inc. All rights reserved. REI, the REI Tree and Mountain design, Novara, and
    REI Adventures are trademarks of Recreational Equipment, Inc.

    Find REI on: FacebookTwitterYouTubeFlickrMobile site