Rifarter U-Lock Bike Lock 18mm Heavy-Duty with 5ft Steel Cable, 4-Digit Combo & Mount

Rifarter Heavy Duty 18mm U-Lock with an included 5-foot steel cable is a keyless, resettable 4-digit combination lock designed to secure bikes, e-bikes, scooters and other gear.

This lock pairs a hardened A3 steel U-shackle with a flexible 5ft steel cable and a frame mount for everyday carry. Built with a PVC outer layer to protect paint, a 4-digit combination offering 10,000 code possibilities, and two backup brass keys (for code recovery lookup only), the Rifarter set balances strong physical resistance with user-friendly features. It’s engineered to be used alone for frame-and-wheel locking or together with the cable to secure multiple wheels or additional bikes.

How resistant is this U-lock to common break-in methods?

The U-shaped shackle is made from 18mm A3 high-strength steel to resist hydraulic shear and cutting tools better than thinner alloys. The lock cylinder and shackle are protected by a PVC sleeve to reduce wear and prevent frame scratches.

• 18mm A3 hardened steel shackle for improved cut resistance
• PVC coating to prevent paint damage and reduce cylinder wear
• Solid lock body design to deter levering and prying attempts

Can I secure more than one bike or prevent wheel theft?

Yes — the included 5-foot steel cable increases the lock’s versatility. Use the cable through front and rear wheels or loop multiple frames, then fasten the U-lock to a fixed object for fuller protection against wheel removal and multi-bike parking.

• 5ft flexible steel cable lets you secure two to three bikes or both wheels
• Use cable through wheels and U-lock through frame to anchor to immovable fixtures
• Cable plus U-lock combination solves common multi-bike parking scenarios

How do I set and use the 4-digit combination?

Out of the box the lock is preset to "0000". To program your personal code, align the digits to your chosen number, press and hold the reset button while turning the dials, then release to save. Two brass keys are included to help recover forgotten combinations but do not operate the lock as regular keys.

• Factory code: 0000; resettable to any 4-digit number (10,000 combinations)
• Step-by-step reset: align code, hold RESET, rotate dials, release to lock in
• Two brass recovery keys included to locate a forgotten combination only

Will this lock fit my bike and how is it carried?

The Rifarter kit includes an adjustable mounting bracket that fits round bike tubes up to 63mm in diameter for secure frame attachment. The U-lock internal clearance (5.91in x 4.72in) accommodates most frames and wheel combinations; use the cable when extra reach is needed.

• Mount bracket fits seat tubes or down tubes up to 2.48in/63mm diameter
• U-lock internal size: 5.91in x 4.72in; external size: 8.46in x 7.28in
• Comes with bracket, screws, U-lock, 5ft cable, and two keys for transport and installation

Who is this for: The Rifarter Heavy Duty U-Lock with cable is suited for commuters, urban cyclists, e-bike owners and scooter riders who need a practical, transportable security solution that balances strong materials with flexible coverage. It’s a good choice for riders who routinely lock at racks, in transit hubs, or in shared storage where resisting common cutting tools and securing multiple wheels matters most. Keep in mind no lock is invulnerable—pair smart locking technique with suitable parking choices for best results.