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Kryptonite Kryptolok Series 2 Standard Bicycle U-Lock with Transit FlexFrame Bracket (4-inch x 9-inch) with 4-Foot Flex Cable

4.2 out of 5 stars 2,051 customer reviews
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List Price: $49.95
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  • 13mm hardened Performance steel shackle resists cutting and leverage attacks
  • Includes 4’ KryptoFlex™ double loop cable for securing front wheel or accessories
  • Reinforced hardened cross bar design provides increased protection
  • High security, disc-style cylinder
  • Anti-rattle bumpers reduce noise during transport
  • Rotating dustcover protects cylinder
  • Includes new Transit FlexFrame-U transportation system which allows for versatile carrying
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55 new from $13.29 2 used from $32.95 1 refurbished from $34.97

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$34.95 & FREE Shipping. Details In Stock. Sold by Amazing Deals Online and Fulfilled by Amazon. Gift-wrap available.

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Technical Details

Product description

The next generation in standard bicycle security with an optional $1500 USD anti-theft protection offer (note: coverage is not included, customer must register for ATPO) with a security rating of 6 of out 10 and includes a KryptoFlex Looped Cable 4' long for complete protection. Kryptonite U-locks represent extreme security while maintaining a realistic size/weight. U-locks represent the most popular lock for enthusiasts. In the early 1970s, Michael Zane was a free-spirited, bearded kid with a VW van and a big idea for a new kind of lock. He traveled thousands of miles showing the unique U-shaped locking device and spreading his passion for bicycle security to bike dealers all around the country and forged lifetime relationships. The company soon expanded its product line to include powersports, hardware and snowsports security.

About Kryptonite
In the early 1970s, Michael Zane was a free-spirited, bearded kid with a VW van and a big idea for a new kind of lock. He traveled thousands of miles showing the unique U-shaped locking device and spreading his passion for bicycle security to bike dealers all around the country and forged lifetime relationships. The company soon expanded its product line to include power sports, hardware, and snow sports security. Through innovative product designs, cutting-edge marketing savvy, legendary customer service, and pure fanaticism for security, Kryptonite grew with a cult-like following. In 2001, the company that was started in a VW van was purchased by industry giant Ingersoll Rand and became a flagship brand in the company's Security Technologies sector. Publications such as BicyclingFortuneThe Wall Street JournalUS News & World Report, and a host of others continued to tout Kryptonite products as the best on the market. The company's dedication to its customers is best represented by its actions during the fall of 2004, when it was discovered that the industry-standard tubular cylinder could be compromised, at times, with a household item. Kryptonite flew into action, created a voluntary lock exchange program, and replaced more than 400,000 locks in 21 countries for free. In essence, the company redesigned the equivalent of nine years worth of new products in just 10 short months. Kryptonite is the only company in the world that offered such a comprehensive plan to customers, taking its "legendary customer service" pledge to new heights.

The Legendary Durability of Kryptonite Locks

A legendary test for Kryptonite's new bicycle locks came in 1972. The Second Avenue Bicycle Shop in New York City locked a three-speed bicycle to a signpost in Greenwich Village under Kryptonite founder Michael Zane's direction. Although all of the removable parts were immediately stripped by thieves, the bicycle itself remained for thirty days and thirty nights. The Kryptonite lock and the bike frame were still in place, even though the lock had been attacked numerous times. Publicity from this event gave Kryptonite the boost it needed, forever changing the face of bicycle security.

Twenty-two years later, Kryptonite returned to the streets of the Big Apple to test its latest innovation - The New York Lock. In April, 1994, the New York Post laid down the ultimate challenge: Could Kryptonite's New York Lock last 48 hours on the toughest streets of New York? Michael Zane and Neil McDaid, Director, Product Development and Design, set out to prove, once again, Kryptonite was up to the test.

In a city where over 100,000 bikes were stolen each year, Kryptonite and the New York Post took a brand new, bright green Univega road bike worth $600 and locked it to a parking meter in the East Village; the "Bermuda Triangle" of New York bicycle thievery. For a full 48 hours, the bike remained locked on the corner of Avenue A and 11th Street.

Subsisting on cold coffee and a strong belief in their product Zane and McDaid watched from around the corner and witnessed as the bike came under every possible means of assault, stumping thieves at every turn. After 48 hours the bike remained intact except for the gear derailer, which had been stripped off. The lock showed definite signs of abuse, but it had not failed. The New York Lock had met the Post's challenge.

Not satisfied with the length of the test, Zane moved the bike to SoHo for another six days and, finally, uptown near the Lincoln Center. Even in these high-theft areas the properly locked bike lasted another three weeks before being pulled off the streets by Zane and McDaid - not a thief. Kryptonite was convinced that this product indeed offered the ultimate security protection.

To compare the New York Lock against other U-locks, the New York Post then ran a battery of street tests using the common bike theft tools: a 4-foot bolt cutter, a crowbar and a hammer. The non-Kryptonite locks cracked in seconds, but all methods failed on the New York Lock, even the monstrous bolt cutter, which ended up useless with large dents in its jaws.


Product details

For warranty information about this product, please click here [PDF]
  • Product Dimensions: 9 x 4 x 1.2 inches ; 3.6 pounds
  • Shipping Weight: 3.7 pounds (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B005YPK8G2
  • Item model number: LK41051
  • Average Customer Review: 4.2 out of 5 stars  See all reviews (2,051 customer reviews)
  • Amazon Best Sellers Rank: #215 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
  • For warranty information about this product, please click here [PDF]


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