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  • Kryptonite Messenger Mini U-Lock
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KryptoniteMessenger Mini U-Lock

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Item # KRY002R

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Meets the needs of NYC messengers.

Designed with extensive input from NYC bike messengers, the Kryptonite Messenger Mini U-Lock uses an 11-millimeter hardened steel shackle to fend off the efforts of determined thieves when you're running errands and stopping quickly for coffee in big cities. It's rated as a seven out of ten on Kryptonite's security scale, meaning it's ideal for quick stops in big cities and college campuses where cunning thieves are known for stealing anything not bolted down in mere minutes. With this security rating you can leave your bike out longer in rural and suburban settings without worrying about returning to nothing at the bike rack, fixture, or street pole.

It's small enough to easily slip into your backpack or tuck into the back of your jeans when you're zipping around town delivering packages or simply commuting across town. Two stainless steel keys are included with a stretchy wristband for security. You can register your keys with the Key Safe Program by Kryptonite, which replaces lost keys for free without hassle. Other key features with this Messenger Mini U-Lock include a bent foot for easier release/entry, a rotating dust cover to keep the key hole clean, and wheel extender for locking up the rear wheel.

  • Mini U-Lock with high security rating (7/10 on Kryptonite's scale)
  • Ideal for short stops in cities and longer stops in rural areas
  • 11mm hardened steel shackle fends off determined thieves
  • Wheel extender for locking up your bike's rear wheel
  • Rotating dust cover keeps keyhole from getting dirty
  • Two stainless steel keys with stretchy wrist straps
  • Kryptonite Key Safe Program replaces keys for free
Tech SpecsWeight
Tech Specs
hardened steel shackle
Lock Type
mini U-Lock with wheel extender
[lockable height x width of U-Lock] 6.5 x 3.75in
Recommended Use
Manufacturer Warranty
limited lifetime

Claimed Weight

Claimed weights are provided by the vendor.

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2lb 8oz

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Perfect balance of security and size

  • Familiarity: I've used it several times

When it comes to picking bike locks it can be a real hassle balancing security concerns with practicality. I really like this lock because it is small enough and light enough that it isn't a burden to carry around, yet it is secure enough to safely lock up a bike under normal conditions.

I'm never away from the bike for more than a couple hours at a time and I always lock it in either a high traffic area or hidden. I suspect that cutting through this lock would likely require an angle grinder and make an awful lot of noise and take probably 10 minutes or so.

Most bike thefts are crimes of opportunity so you just need to make it difficult enough that the thief moves on. If someone is already coming at your bike with an angle grinder in hand, I'm not sure that there is realistically much you could do to stop them.

Another big benefit to this lock is that it is small enough that I can easily loop it around my head tube for transport and it doesn't interfere with my ride at all.

Perfect balance of security and size