Rank #3 in Best Bike Locks 2026: 10 Ranked, Diamond Beats Gold on Price
Kryptonite Kryptolok Standard U-Lock with 4 ft Cable
Price and rating as shown on Amazon when we collected them. Both change.
The Kryptonite Kryptolok Standard U-lock with 4-foot Flex Cable takes #3 in this guide at £38.75. It is the dearer of the two Kryptonite locks here, and it is the one whose Anti-Theft Protection Offer is quoted in sterling: the bullet reads 'Optional ATPO - £1,000', while the £18.03 Combo U-lock in the same guide quotes that same Kryptonite programme as 'up to $500'. The listing carries 4.5 out of 5 from 6,017 ratings, Sold Secure Bicycle Gold certification, and Kryptonite's own score of 6/10 on its security scale. Best Sellers Rank is given as 4 in Cycling U-Locks.
The ad is also loose about what is actually in the box. The title says 'w/4-foot Flex Cable' and a bullet says 'Complete solution with U-lock and cable', yet the specification fields read Number of Pieces: 1 and Included Components: Locks. No key count appears anywhere in the listing, and a few fields look like placeholders: Controller Type is 'Hand Control', Manufacturer is 'MDSL4' and Unit Count is '1 unité'.
Everything on this page comes from the Amazon listing, not from testing we carried out, so the certification, the security score and the offer amount are the seller's claims rather than our own measurements.
How those 6,017 ratings break down
An average hides its own shape. This is the spread behind the 4.5 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £38.75 |
|---|---|
| Rating | 4.5 out of 5 (6,017 ratings) |
| Sold Secure certification | Bicycle Gold |
| Kryptonite security scale | 6/10 |
| Anti-Theft Protection Offer | Optional, £1,000 |
| Best Sellers Rank | 4 in Cycling U-Locks |
| Number of Pieces (as listed) | 1 |
| Included Components (as listed) | Locks |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“This lock is large, heavy and very solid. The solid metal core is good too rather than weaved strands which is weaker.Check the weight though as it's much heavier than I expected. Bear in mind they make locks going up to £300 that resist multiple changes of diamond cutting discs on angle grinders so don't expect that level of quality for £30 but it'll stop the majority of casual thieves.”
Verified purchase“Excellent lock, locks and unlocks every time. Good build quality, comes with two keys! Thank you.”
What it is up against
The rivals it was ranked against in Best Bike Locks 2026: 10 Ranked, Diamond Beats Gold on Price.
Questions people ask
What security certification does the Kryptolok carry?
The listing states Sold Secure Bicycle Gold certification and rates the lock 6/10 on Kryptonite's own security scale.
Does the Kryptolok come with a cable?
The listing is inconsistent here. The title says 'w/4-foot Flex Cable' and a bullet says 'Complete solution with U-lock and cable', but the specification fields read Number of Pieces: 1 and Included Components: Locks.
What does the Anti-Theft Protection Offer cover?
The bullet reads 'Optional ATPO - £1,000'. The listing gives no further terms, and unlike the cheaper Combo U-lock in this guide, this one quotes the figure in sterling.
How much does the Kryptolok cost?
The listing price is £38.75, where it holds 4.5 out of 5 from 6,017 ratings.
How many keys are supplied?
The listing never states a key count. It carries a 'Key Safe Program' bullet instead, and no specification field covers keys.
How long is the warranty?
The Manufacturer Warranty Description field reads 2 years.
Comments
Reader comments are not checked against the manufacturer's claims above.
No comments yet
Be the first to add something we missed — a price change, a spec that turned out wrong, or how one of these held up.
Leave a comment
No account needed. Own one of these? Tell other readers how it actually performed.