Kryptonite Keeper 785 Chain Bike Lock — 2.8 ft / 85 cm Heavy-Duty 7mm Manganese Steel with Nylon Sleeve

The Kryptonite Keeper 785 is a compact 2.8 ft heavy-duty chain lock built from 7mm four-sided manganese steel links and a hardened deadbolt to protect your bike from common cutting and leverage attacks. Whether you commute, run errands, or store a bike in shared spaces, the Keeper 785 balances portability and robust construction for everyday security. It measures 85 cm (33.5 in) in circumference, weighs 1.59 kg (3.50 lbs), and ships with two ergonomic "I" keys plus eligibility for Kryptonite's Anti-Theft Protection Offer and KeySafe replacement program.

How does the Keeper 785 resist cutting and leverage attacks?

The chain uses 7mm four-sided links forged from 3T manganese steel, giving each link a geometry and alloy that increase resistance to bolt cutters and hand tools. A patent-pending end link design directly secures the chain to a hardened deadbolt, removing the common weak spot found on many chain locks.

• 7mm four-sided links manufactured from 3T manganese steel for enhanced tool resistance
• Patented end link locks directly into a hardened deadbolt to eliminate vulnerable joints
• Rated 5/10 on Kryptonite's security scale for moderate daily protection

What tamper protection does the lock cylinder provide?

The Keeper 785 uses a high-security disc-style cylinder that is engineered to resist picking and drilling techniques. The cylinder's internal design and hardened components make quick tampering far more difficult, giving you more time to notice and deter theft attempts.

• Disc-style cylinder resists common picking methods
• Drill-resistant construction inside the locking core
• Includes two ergonomic "I" style keys for reliable operation

Will this chain scratch or weather my bike during regular use?

To protect finishes and handle outdoor exposure, the Keeper 785 is covered by a weather-resistant nylon sleeve that prevents metal-to-paint contact and reduces abrasion. The sleeve also helps keep the chain cleaner and quieter when carried or wrapped around a frame.

• Durable nylon sleeve reduces paint wear and prevents scratches
• Weather-resistant materials help limit corrosion and exposure damage
• Compact length and sleeve protect racks, frames, and accessories when stowed

What comes with the purchase and what support is available?

Each Keeper 785 ships with two ergonomic "I" keys and is eligible for Kryptonite's KeySafe replacement program and Anti-Theft Protection Offer if registered. Kryptonite also backs the product with a limited lifetime warranty and customer support for defects or issues.

• Includes two ergonomic keys for easy handling
• Eligible for Anti-Theft Protection Offer when registered
• Limited lifetime warranty and Kryptonite customer service support

Who is this for? The Keeper 785 suits riders who need a portable, tougher-than-average chain for daytime stops, urban commutes, or storing a bike in semi-public areas. It’s a practical choice when you want better cut resistance than cable locks but prefer a shorter, lighter chain than full-length heavy chains. Choose this lock if you value a compact size, weather protection, and access to replacement key and theft-protection programs without carrying extremely heavy hardware.

FAQ

Q: How long is the Keeper 785 chain?

A: The chain is 85 cm (33.5 inches) in circumference, offering compact coverage for wheels and frames.

Q: Does the lock include keys and warranty?

A: Yes. It includes two ergonomic keys and a limited lifetime warranty with Kryptonite customer support.