Weight is the honest measure of how much steel a lock actually carries · review
A 14 mm U-lock with a double deadbolt, a 4 × 9-inch interior, a frame bracket and a lifetime warranty.
Our conclusion A 14 mm Kryptonite Evolution U-lock with a double deadbolt against twist attacks, 4 × 9-inch interior, a FlexFrame-U bracket, three keys and a lifetime warranty. The middle of the Kryptonite range.
See the best bike lock.
Read on the day this page was built: $126 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 | 14 mm hardened steel |
|---|---|
| Locking | Patented hardened double deadbolt |
| Interior | 4 × 9 in |
| Weight | 3.50 lb |
| Keys and mount | 3 stainless keys; FlexFrame-U bracket |
| Cover | Anti-Theft Protection Offer up to $3,000 for registered locks; lifetime warranty |
| Amazon reference | B06XCP8Y8S |
| EAN | 0720018002130 |
Both ends of the shackle lock into the crossbar, so a thief has to cut twice instead of once and twist.
The 4 × 9-inch interior fits most frames and a rack; measure thick e-bike tubes.
8.1/ 10
A 14 mm Kryptonite Evolution U-lock with a double deadbolt against twist attacks, 4 × 9-inch interior, a FlexFrame-U bracket, three keys and a lifetime warranty. The middle of the Kryptonite range.
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 Evolution Standard (2130) | $126 | 3.50 lb |
| ABUS Bordo Big 6000K folding lock, 120 cm | $114 | 1,546 g (3.4 lb) |
| Kryptonite New York Standard (2154) | $138 | 4.5 lb in the catalog |
| Seatylock Foldylock Compact folding lock, 33.5 in | $95 | 1 kg (2.2 lb) |
A daily commuter bike locked at work and at the store
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
18 mm shackle · double deadbolt · steel crossbar sleeve · 3.25 × 6 in interior · 4.55 lb · 10/10 Kryptonite rating · 3 keys · lifetime warranty
An 18 mm mini U-lock rated 10/10 on Kryptonite’s scale, with a double deadbolt and a sleeved crossbar.
Best for: An expensive bike or e-bike parked in the highest-risk places
≈ $180
