Kryptonite Evolution Series 4 Disc
Kryptonite

Kryptonite Evolution Series 4 Disc

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Kryptonite Evolution Series 4 Disc is a heavy-duty 14mm U‑lock with a double-deadbolt and reinforced disc cylinder for high resistance to cutting, leverage and drilling. Includes three keys (one lighted), sliding dust cover and Key Safe program.

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Product Details

Overview & Technology

Kryptonite Evolution Series 4 Disc combines a 14mm hardened Max‑Performance steel shackle with a reinforced disc‑style cylinder to deliver a proven balance of cut resistance and pick/attack protection. The shackle's hardened steel construction and anti‑leverage design reduce vulnerability to bolt cutters and pry bars, while the double deadbolt locking mechanism provides strong holding power under force. The disc-style cylinder has layered anti‑drill and anti‑pull protection inside a compact housing, and a sliding dust cover keeps grit and moisture out to prolong smooth operation. Small details like the lighted key (replaceable battery) and Kryptonite's Key Safe program make everyday use simpler and more secure.

Key Features

This Evolution Series 4 Disc variant (46 x 53mm internal) packs practical, ride-ready features: • 14mm Hardened Max‑Performance steel shackle for superior shear and cutting resistance. • Double deadbolt locking secures both sides of the shackle to minimize wobble and defeat prying. • High‑security disc cylinder with reinforced anti‑drill and anti‑pull elements protects against cylinder attacks. • Three keys included, one with a high‑intensity light and replaceable battery for nighttime convenience. • Sliding dust cover prevents debris ingress and extends cylinder life in all weather. With an 8/10 security rating, this U‑lock is engineered for daily urban use where high theft risk demands robust protection.

Fit & Compatibility

The internal lock size is 46 x 53 mm (1.8" x 2.1"), making the Evolution Series 4 Disc ideal for securing a bike frame and front wheel to standard street posts, racks and many security anchors. The 14mm shackle is thick enough to resist handheld cutting tools while still fitting most rack and post clearances. Before buying, measure the intended locking point and your frame geometry. If you need to secure both wheels or larger frame-and-wheel combinations, pair the U‑lock with a flexible cable or chain to extend reach and coverage. This model ships in black and weighs 1.8 lb — light enough for daily commuting yet substantial in protection.

Who It's For

Designed for urban cyclists and road commuters who lock their bikes in higher‑risk areas, the Evolution Series 4 Disc is a reliable choice for shoppers who want strong mechanical security without bulky weight. It's especially well suited to riders who park at busy transit hubs, city centers, or multi‑bike workplaces. Weekend city riders and occasional overnight stoppers will appreciate the combination of a high‑security cylinder, practical accessories (lighted key, dust cover) and a compact form factor that balances security and portability.

Key Features

  • ✓ 14mm hardened Max‑Performance steel shackle resists cutting and leverage
  • ✓ Double deadbolt locking mechanism for extensive holding power
  • ✓ High‑security disc cylinder with reinforced anti‑drill and anti‑pull guards
  • ✓ Sliding dust cover protects cylinder from grit and weather
  • ✓ Includes three keys — one lighted with replaceable battery
  • ✓ Key Safe program for secure key replacement and registration
  • ✓ Internal size 46 x 53mm fits most racks and frame/wheel combos

Specifications

Internal Lock Size Metric 46x53mm
Lock Type Key
Primary Color Black
Thickness In mm 14mm
Internal Lock Size Imperial 1.8'' x 2.1''

Product Identifiers

Vendor Item # 999607
UPC 720018999607

Frequently Asked Questions

What does the 8/10 security rating mean in real terms?

An 8/10 rating denotes high resistance to common theft tools and attack methods (bolt cutters, leverage attacks, basic picking). It’s well suited for high‑risk urban parking but not invulnerable to determined professional thieves with heavy tools.

Can I register the lock with Kryptonite's Key Safe program?

Yes — the Evolution Series 4 Disc includes access to Kryptonite's Key Safe program. Registering helps you order replacement keys that match your lock's code without needing to send the lock in, streamlining key replacement if you lose them.

Will this U‑lock fit my bike and rack?

The internal clearance is 46 x 53 mm (1.8" x 2.1"). It fits most standard racks and posts and will secure the frame plus one wheel in many setups. Measure the gap at your preferred locking points to ensure adequate clearance; for larger needs combine with a cable or chain.

Is the cylinder weatherproof and easy to use in cold climates?

The sliding dust cover protects the cylinder from dirt, grime and moisture, reducing the chance of freezing and keeping the keyway clean. Regular light lubrication and keeping the dust cover closed when not in use will maximize reliability in wet or cold conditions.

What should I do if I lose the lighted key?

You can use Kryptonite’s Key Safe program to order replacement keys using the lock’s key code. Keep your key code stored in a safe place (not on your bike) and contact Kryptonite support for guidance on ordering replacements.

Does this lock come with a mounting bracket?

This product listing describes the Evolution Series 4 Disc lock itself; mounting brackets or frames are sometimes sold separately. Check the product variant details or add a compatible bracket from Forest Bikes if you want on‑bike carry.

Buying Guide

When choosing a U‑lock, prioritize shackle thickness, cylinder quality, and internal size. Thicker shackles (12–16mm) offer superior resistance to cutters; a high‑security disc cylinder reduces the risk of drilling or pulling attacks. Match internal dimensions to your most common locking scenarios — too small and the lock won't close, too large and you carry unnecessary bulk. For urban commuters, a compact high‑security U‑lock like the Evolution Series 4 Disc paired with a flexible cable for the rear wheel offers a practical balance of protection and portability. Consider a mounting bracket for convenient on‑bike carry and register the lock with the manufacturer's key program to simplify replacement if keys are lost.

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