Kryptonite Evolution 1090 Bike Chain Lock — 3 ft 10mm, Sold Secure Gold, Nylon Sleeve

The Kryptonite Evolution 1090 is a 3‑ft, 10mm six‑sided manganese‑steel chain lock with an integrated Evolution Series 4 head, built to give strong, portable protection for bicycles and e‑bikes in urban environments.

If you need a balance of high resistance and manageable weight for daily use, the Evolution 1090 is designed to resist common cutting and leverage attacks while still being simple to carry. Kryptonite engineered this chain with hardened 3T manganese steel links, a reinforced lock head, and a nylon sleeve to protect frames. It ships with three keys and a dust cover for the cylinder to prolong dependable operation in everyday conditions.

How secure is the Evolution 1090 against thieves?

The lock uses 10mm six‑sided 3T manganese steel links and a reinforced oval crossbar head to increase resistance to bolt cutters and pry attacks. Kryptonite rates it 8/10 on its internal scale and it holds a Sold Secure Gold certification, indicating robust performance versus advanced theft attempts.

• 10mm six‑sided hardened manganese steel chain for cut resistance
• Reinforced patent‑pending Evolution Series 4 lock head for leverage protection
• Pick‑resistant disc‑style cylinder to reduce lock manipulation
• Sold Secure Gold rating for elevated security expectations

Will this chain fit my e‑bike or heavier bicycles?

At roughly 3 ft (90 cm) long, the chain gives a practical reach to secure thicker poles, bike racks, or two bikes together while remaining compact enough to stow or carry. Its weight — about 6.10 lbs (2.77 kg) — is heavier than small cable locks but typical for a high‑security chain aimed at e‑bikes and urban commuting bikes.

• 3 ft / 90 cm length for common locking scenarios
• Approx. 6.10 lbs (2.77 kg) total weight for solid resistance
• Good fit for e‑bikes, city bikes, and scooters where rigidity is needed
• Chain links accommodate widely used pole and rack sizes

How does the lock protect my bike’s finish and perform in bad weather?

The chain is covered in a durable nylon sleeve to prevent metal‑on‑metal contact that can scratch paintwork. A sliding dust cover shields the cylinder from moisture and grit, helping maintain smooth key action and reducing corrosion risk over time.

• Durable nylon sleeve protects frames from scratches and chips
• Sliding dust cover keeps out dirt and water for longer life
• Stainless steel keys resist rust for reliable use
• Simple maintenance extends serviceable life outdoors

What’s included and what warranty or protection applies?

The Evolution 1090 arrives with three stainless steel keys so you have backups for daily usage. Kryptonite offers a limited lifetime warranty and the option to register the lock for Anti‑Theft Protection coverage (ATPO), which can provide compensation up to specified limits for qualifying thefts.

• Three durable stainless steel keys included
• Eligible for Kryptonite Anti‑Theft Protection Offer registration
• Limited lifetime warranty and customer support available
• Designed for everyday urban and overnight parking scenarios

Who this lock is for: Riders who commute, own e‑bikes, park overnight, or live in higher‑risk urban settings and want a practical balance of portability and elevated security. If you need protection that outperforms lightweight cables and U‑locks of similar weight, but you still want to carry your lock day‑to‑day, the Evolution 1090 fits that need. Consider heavier or longer chains only if you require wider locking options or maximum deterrence for long‑term unattended storage.