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The Kryptonite WheelNutz lock nuts fit the axel of the front hub and locks the wheel to the frame thanks to an internal system that is activated by the force of gravity. With the bicycle right-side up the nuts are locked, turning the bike 180º the nuts are unlocked. If you use the WheelNutz combined with the U-shaped padlock Messenger Mini you'll have a complete theft protection for your bike.
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 people at Kryptonite have a pure passion for creating the best security in the world. It's their innovative product designs, intimate knowledge of market trends and complete commitment to customers that will continue to keep the competition striving to reach the high bar Kryptonite sets and allows their customers to feel free to stop wherever they want.