Kryptonite Evolution vs Abus Granit X-Plus 540
The two most-recommended U-locks for city bikes. Both have 16 mm hardened-steel shackles - the difference is keyway design, weight, and which insurance-approved security rating they actually carry.
- Security rating: Kryptonite 8/10 (Sold Secure Gold)
- Shackle: 16 mm hardened performance steel
- Weight: 1.27 kg
- Cylinder: laser-cut key, pick-resistant disc-style
- Inner dimensions: 4" x 9" (10 x 23 cm)
- FlexFrame-U mount included
Sizing: Inner 4" x 9" - fits frame + single wheel through the U + a fixed object. Standard daily-commuter size.
MSRP: $65-80 · Amazon ~$47.95
- Security rating: Sold Secure Gold / ART 4 stars
- Shackle: 13 mm Abus PowerCell hardened steel
- Weight: 1.5 kg
- Cylinder: Abus X-Plus disc-detainer (anti-pick)
- Inner dimensions: 5.5" x 8" (14 x 20 cm)
- EaZy KF frame mount included
Sizing: Inner 5.5" x 8" - taller shackle window for thicker frames, U-rack posts, and frame + wheel security.
MSRP: $80-100 · Amazon ~$159.00
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Side-by-side spec sheet
| Aspect | Evolution Series 4 Standard | ABUS Granit X-Plus 540 | Winner |
|---|---|---|---|
| Security rating | Kryptonite 8/10 (Sold Secure Gold) | Sold Secure Gold / ART 4 stars | X-Plus 540 |
| Shackle diameter | 16 mm | 13 mm PowerCell | 4 Standard |
| Cylinder | Disc-style, pick-resistant | X-Plus disc-detainer | X-Plus 540 |
| Inner dimensions | 4" x 9" | 5.5" x 8" | Tie |
| Weight | 1.27 kg | 1.50 kg | 4 Standard |
| Frame mount included | Yes (FlexFrame-U) | Yes (EaZy KF) | Tie |
| Anti-theft guarantee | Yes (US/Canada) | Limited | 4 Standard |
| Amazon price | $47.95 | $159.00 | 4 Standard |
The verdict
Pick the Kryptonite Evolution if you want the best-known keyway, free Anti-Theft Protection Offer in the US/Canada, and the broadest replacement-key network - at less than a third of the Abus's Amazon price right now. Pick the Abus Granit X-Plus 540 if you live somewhere bike theft is endemic - the X-Plus disc-detainer cylinder and ART 4-star rating are the gold standard for European insurance approval.
Best value
Kryptonite Evolution - Sold Secure Gold + Anti-Theft Protection Offer at under $50 on Amazon, with a thicker 16 mm shackle.
Best performance
Abus Granit X-Plus 540 - ART 4-star insurance rating and the X-Plus disc-detainer cylinder resist picking and drilling better than any standard pin tumbler.
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