Weight is the honest measure of how much steel a lock actually carries · review
An 18 mm mini U-lock rated 10/10 on Kryptonite’s scale, with a double deadbolt and a sleeved crossbar.
Our conclusion Kryptonite’s top U-lock: an 18 mm shackle, a double deadbolt, a steel sleeve over the crossbar, a 3.25 × 6-inch interior and a 10/10 rating on Kryptonite’s scale, at 4.55 lb.
See the best bike lock and bike locks for e-bikes.
Read on the day this page was built: $180 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text are dated readings and can differ from the live price in the buy box.
| Shackle | 18 mm hardened max-performance steel |
|---|---|
| Locking | Double deadbolt; steel sleeve over crossbar |
| Interior / exterior | 3.25 × 6 in / 9.5 × 6 × 2 in |
| Weight | 4.55 lb |
| Rating | 10/10 on Kryptonite’s scale |
| Program | ATPO and KeySafe eligible; lifetime warranty |
| Amazon reference | B06XCMWW9H |
| EAN | 0720018002178 |
A small interior leaves no space for leverage tools, and a shorter shackle is harder to attack.
Only narrow racks and posts; measure, since the interior is 3.25 × 6 inches.
8.1/ 10
Kryptonite’s top U-lock: an 18 mm shackle, a double deadbolt, a steel sleeve over the crossbar, a 3.25 × 6-inch interior and a 10/10 rating on Kryptonite’s scale, at 4.55 lb.
Same category, nearby prices, between bike gear. What remains is the specifications every one publishes — half empty, a column is no use.
| Model | Price | Weight |
|---|---|---|
| Kryptonite New York Fahgettaboutit Mini (2178) | $180 | 4.55 lb |
| Kryptonite New York Standard (2154) | $138 | 4.5 lb in the catalog |
| Kryptonite Evolution Standard (2130) | $126 | 3.50 lb |
| ABUS Bordo Big 6000K folding lock, 120 cm | $114 | 1,546 g (3.4 lb) |
An expensive bike or e-bike parked in the highest-risk places
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
13 mm shackle · double deadbolt · Sold Secure Gold · 3.25 × 7 in · 3.55 lb
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.
Best for: City riders who lock to a standard bike rack for hours.
≈ $82.88
12 mm hardened steel · 4 × 8 in interior · 2.05 lb · vinyl coating · disc cylinder · bracket · 2 keys
A 12 mm U-lock at 2.05 lb with a 4 × 8-inch interior, for quick stops in lower-risk places.
Best for: A café stop, a suburban rack, or a second lock for the front wheel
≈ $47
