U-locks
Which Kryptonite U-lock should I buy, the Evolution or the New York?
Both are full-size Kryptonite U-locks with a pick- and drill-resistant disc cylinder and a FlexFrame-U bracket. The New York has the thicker shackle, 16 mm against 14; the Evolution locks at both ends, weighs a pound less, publishes its 4 × 9-inch interior and comes with a third key.
| Compared on | Evolution Standard (2130) | New York Standard (2154) |
|---|---|---|
| Shackle | 14 mm hardened max-performance steel | 16 mm hardened max-performance steel |
| Against twisting | Patented double deadbolt | Patented anti-rotation features on the shackle |
| Cylinder | Disc-style, pick and drill resistant | Disc-style, pick and drill resistant, sliding dust cover |
| Weight | 3.50 lb | About 4.5 lb in the catalog |
| Interior | 4 × 9 in | Not published in the listing |
| Keys | 3 stainless steel keys | 2 stainless steel keys |
| Bracket | FlexFrame-U | FlexFrame-U |
| Warranty and theft offer | Lifetime warranty, anti-theft offer up to $3,000 | Not stated in the listing |
| Price on November 12, 2026 | $127.77 | $145.87 |
| Listed on amazon.com | Yes | Yes |
A tick marks the better answer on that line only. Counting ticks does not decide the page — the two verdicts below do, because these products answer different questions.
Buy the Evolution for a commuter bike parked at work and at the store: 14 mm with a double deadbolt is a serious lock, a pound lighter to carry every day, with a published interior that fits frame and rack and a written theft offer.
Buy the New York for overnight or high-theft streets: the 16 mm shackle is the larger obstacle to bolt cutters, and the extra pound and about $18 are the price of it.
The Evolution's 4 × 9-inch interior fits most frames. The New York listing does not publish its interior, so measure thick e-bike tubes and the rack before buying it.
Yes, both listings include the FlexFrame-U bracket for carrying the lock on the frame.
A thicker shackle takes a larger bolt cutter or longer with an angle grinder. Both are beyond the small cutters most opportunist thieves carry; the 16 mm is the safer choice where thieves come equipped.
A double deadbolt locks both ends of the U into the crossbar, so one cut is not enough. Anti-rotation features stop the shackle from being turned in the crossbar after a single cut. Both answer the same twist attack.
The Evolution listing states a limited lifetime warranty and Kryptonite's anti-theft protection offer up to $3,000 for registered locks. The New York listing states neither.
The Evolution weighs 3.50 lb; the New York about 4.5 lb according to the Amazon catalog.
14 mm shackle · double deadbolt · 4 × 9 in interior · 3.5 lb · disc cylinder · FlexFrame-U bracket · 3 keys · lifetime warranty · ATPO
A 14 mm U-lock with a double deadbolt, a 4 × 9-inch interior, a frame bracket and a lifetime warranty.
Best for: A daily commuter bike locked at work and at the store
≈ $126
16 mm hardened steel shackle · anti-rotation · disc cylinder, pick and drill resistant · dust cover · FlexFrame-U bracket · 2 keys
A 16 mm hardened-steel U-lock for high-risk areas, with anti-rotation features, a disc cylinder and a frame bracket.
Best for: A valuable bike locked for hours in a city where theft is common
≈ $138
Prices quoted in these summaries are dated readings. The live price is shown next to each product.
