Kryptonite® Evolution Standard U Lock

High Security Steel U-Lock

  • 14 mm max-performance steel shackle
  • New Patent-pending hardened double deadbolt design gives additional protection against twist attacks
  • High security disc-style cylinder is pick and drill resistant
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  • Includes 3 stainless steel keys including new key design and one LED replaceable key fob
  • New smaller crossbar design
  • Includes flexframe-u bracket providing convenient multi-location u-lock transport
  • Protective vinyl coating
  • Eligible for Key Safe Program: Register your key number with Kryptonite for easy replacement of lost or worn keys for a minimal fee
  • Compatible with all Flyer™ eBikes
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Lock Style: U-Lock
Lock Dimensions: 4" x 9"
Product Weight: 3.5 lbs.
Model: AC857
Compatibility: All Flyer™ eBikes

All purchases deliver exclusive benefits: 

  • Free Shipping with account
  • A double warranty
  • Guaranteed brand-new, authentic products shipped direct from manufacturer.
  • A tree planted for each product purchased, and sitewide carbon neutral shipping
  • Radio Flyer is a certified B Corp, meeting the highest standards of verified social and environmental performance, transparency, and accountability.

Recommended for use in metropolitan areas or over extended periods of time.

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