Kryptonite Messenger Mini With U-Lock Extender review

A lightweight and portable mid-security lock with a much greater lockable area than you might expect

Cycling Weekly Verdict

The Kryptonite Messenger Mini With U-Lock Extender manages to be lightweight and portable while still providing a decent level of security (Sold Secure Silver) and respectable lockable area. There’s a range of thoughtful design elements which include a shackle with a bent foot, the rubberised coating, a dustcover for the lock barrel and the U-lock extender – which increases the lockable area significantly without adding much to the size of the lock. However, the lack of a bike mount and the fact it comes with only two keys does count against it.

Reasons to buy
  • +


  • +

    Extra shackle is genuinely useful

  • +

    Relatively secure

  • +

    Sliding dustcover

Reasons to avoid
  • -

    Doesn’t come with a bike mount

  • -

    Only comes with two keys

You can trust Cycling Weekly. Our team of experts put in hard miles testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

The Kryptonite Messenger Mini With U-Lock Extender is intended as something of a goldilocks lock from the American security brand.

>>>Read more: Best bike locks

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