Kryptonite KryptoLok

Summary of Reviews

We have read all expert and user reviews on the Kryptonite KryptoLok. In summary, this is what cyclists think.

7 reasons to buy

  • Kryptonite’s KryptoLok comes in four sizes, from the 3.25” x 7” Mini-7 to the 5” x 9” ATB.
  • The KryptoLok gets a Gold rating from third-party tester Sold Secure and 2/5 stars from ART.
  • Long-term owners find the KryptoLok durable.
  • The KryptoLok LS has a long 11.5” shackle that’s long enough to secure two bikes side by side.
  • The Kryptolok ATB’s wide 5” shackle can fit around fat tires or e-bikes with thick frame tubing.
  • The included bike mount will attach to multiple frame locations and varied tubing shapes.
  • This lock comes with a lifetime warranty and Kryptonite’s Key Safe Program, where owners can register keys and replace them for free if lost.

7 reasons not to buy

  • Many owners say the lock is fiddly and frustrating to open or close.
  • Some owners report the lock sticking or rusting after a few months.
  • Owners of all versions say the mount shifts and slides on the frame while riding.
  • The KryptoLok LS’s lengthy 11.5” shackle means it won’t fit many bike frames.
  • Reviewers say the KryptoLok rattles noisily while riding over bumpy roads.
  • Buyers complain that Kyrptonite’s customer support is unresponsive.
  • Owners criticize Kryptonite’s theft reimbursement program, saying it’s difficult to contact the company when filing a claim, and some receive no response.

Bottom line

Kryptonite’s KryptoLok is a u-lock with a 12.7mm shackle available in four versions: Mini-7 (W3.25” x L7”), Standard (4” x 9”), LS (4” x 11.5”) and ATB (5” x 9”). This lock gets Sold Secure’s Gold rating and 2/5 stars from ART. Most owners find the KryptoLok durable over years of regular use, though some report rusted locks after a few months. The included carry mount fits different frame tubing shapes, but some owners say it slides while riding. Multiple owners complain the lock rattles, and many find the locking mechanism finicky. Despite these flaws, most owners consider the KryptoLok good value.
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Facts

Lock Type
Brand
Weight
2.5, 2.9, 3.2 lb
Diameter / Thickness
12.7 mm
Length
7, 9, 11.5 Inches
Width
3.25, 4, 5 Inches
Material
Steel, Vinyl

Expert Reviews

0/100 based on 0 rated expert reviews
The Gizmo Garage

Kryptonite New-U KryptoLok Standard U-Lock With Cable Reviewed

I… want to have peace of mind, [so] that is why I bought this U-lock.

Visit full review

User Ratings

79/100 based on 1548 ratings
  • 5 star
    55%
  • 4 star
    17%
  • 3 star
    8%
  • 2 star
    5%
  • 1 star
    14%

Bike Lock Comparison

Kryptonite KryptoLok in comparison to averages