Weight is the honest measure of how much steel a lock actually carries · review
A compact U-lock with a 13 mm hardened shackle, double-deadbolt locking, a Sold Secure Gold rating and a 4 ft double-loop cable.
Our conclusion The strongest everyday choice here: small, rated, and sold with what you need to carry it.
A small U-lock is harder to attack than a big one, because a tighter shackle leaves less room for tools. The Mini-7 builds on that with a rating you can check.
A 13 mm hardened steel shackle, double-deadbolt locking on both sides of the crossbar, a Sold Secure Gold rating, a 4 ft double-loop cable, interior dimensions of 3.25 × 7 in, a total weight of 3.55 lb, and a FlexFrame-U bracket.
The cable is for your front wheel, helmet or accessories. It is a deterrent, not a second lock. The shackle secures the frame and rear wheel to the rack, and the cable loops through the front wheel and back to the shackle.
Measure what you will lock to. Tight shackles fit standard U-shaped bike racks and do not suit thick lampposts. Fit the bracket before your first ride, and test that it does not touch your bottle cage or your knees.
| Type | U-lock with cable |
|---|---|
| Shackle | 13 mm hardened Max-Performance steel |
| Locking | Double deadbolt |
| Rating | Sold Secure Gold |
| Inside size | 3.25 × 7 in |
| Cable | 4 ft (120 cm) double loop |
| Weight | 3.55 lb (1.61 kg) |
| Bracket | FlexFrame-U included |
Sold Secure is an independent British test body. Its Gold grade sits below Diamond. Kryptonite publishes the rating on the listing.
Measure first. The inside space is 3.25 × 7 in, which is designed for a frame and a thin rack, not a thick pole.
8.6/ 10
The strongest everyday choice here: small, rated, and sold with what you need to carry it.
Same category, nearby prices, between bike gear. What remains is the specifications every one publishes — half empty, a column is no use.
| Model | Price | Rating |
|---|---|---|
| Kryptonite Evolution Mini-7 U-Lock with 4 ft cable | $83 | Sold Secure Gold |
| KOHLBURG Large U-lock with cable, 6.7 × 13.5 in | $89 | Sold Secure Diamond, security level 15 of 15 stated |
| Seatylock Foldylock Compact folding lock, 33.5 in | $95 | Sold Secure Silver |
| ABUS Bordo Big 6000K folding lock, 120 cm | $114 | ABUS level 10, for medium theft risk |
City riders who lock to a standard bike rack for hours.
Specifications: the manufacturer sheet for bike gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
14 mm (0.55 in) shackle · Sold Secure Diamond · 6 ft (1.7 m) cable
A large U-lock with a 14 mm (0.55 in) hardened shackle and a Sold Secure Diamond rating, supplied with a 6 ft (1.7 m) cable for the front wheel and accessories.
Best for: Anyone leaving a bike in a city where theft is a real prospect, and who is prepared to carry the weight.
≈ $89.20
Folding · 33.5 in opened · hardened steel · Sold Secure Silver · 1 kg
A folding lock that opens to 33.5 inches, made of hardened steel with anti-tamper rivets, with a frame bracket and a Sold Secure Silver rating.
Best for: Riders who need reach around odd racks, with moderate theft risk.
≈ $94.98
Cable · 4 ft × 5/16 in · preset 4-digit combination · vinyl coated · 4.8 oz
A light 4 ft braided steel cable lock with a preset four-digit combination, best used as a short-stop deterrent or a second lock.
Best for: A helmet, a front wheel, or a two-minute stop in low-risk places.
≈ $8.99
Prices quoted in these summaries are dated readings. The live price is shown next to each product.
