Black bike chain lock with key and combination lock on a white background
ROCKBROS anti-theft bike chain lock showing dual unlocking ways of password and physical keys.
ROCKBROS bike chain lock displays disassembled 4-digit password structure with reliable anti-theft performance.
Black chain lock with measurement details on a white background
ROCKBROS chain lock with protective cloth sleeve on a light gray background
Step-by-step guide on setting a combination lock with clear illustrations.
ROCKBROS bike chain lock displays versatile usage scenarios for bike, electric scooter and baby stroller.
Black bike chain lock with key and combination lock on a white background
ROCKBROS anti-theft bike chain lock showing dual unlocking ways of password and physical keys.
ROCKBROS bike chain lock displays disassembled 4-digit password structure with reliable anti-theft performance.
Black chain lock with measurement details on a white background
ROCKBROS chain lock with protective cloth sleeve on a light gray background
Step-by-step guide on setting a combination lock with clear illustrations.
ROCKBROS bike chain lock displays versatile usage scenarios for bike, electric scooter and baby stroller.
SKU: 3230002001

Combination Bike Chain Lock

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By ROCKBROS-CA
Shipping

Shipping Costs & Delivery Times

1. Standard Shipping

  • Under $100: $5.99
  • $100+: Free
  • Delivery: 3–5 business days

2. Extended Delivery

  • International stock: 7–12 business days
  • Bicycles: 20–25 business days

3. Flat Fees

  • Large items: $10
  • Children’s bikes: $20
  • Folding bikes: $40
  • Full-size bikes: $150

4. No Shipping To Alaska, Hawaii, Puerto Rico, or the U.S. Virgin Islands.
Returns & Warranty

Designed for everyday security and convenience, this combination bike chain lock features a dual unlock system with both a 4-digit code and backup keys. Built with a durable steel chain and protective sleeve, it offers reliable anti-theft protection while staying easy to carry and use for commuting, travel, and daily riding.

Features

    • Dual Unlock System – Code & Key
      Choose between a 4-digit combination lock for quick, keyless access or use the included keys for added security and backup—no more worries about forgetting one method.
    • Enhanced Anti-Theft Protection
      The combination system offers up to 10,000 possible codes, paired with a high-strength steel chain to provide dependable anti-theft protection for daily use.
    • Durable & Frame-Friendly Design
      A protective fabric sleeve helps prevent scratches on your bike frame while reducing wear. Rust-resistant and cut-resistant materials ensure long-lasting durability.
    • Extended 3.2 ft Length for Versatility
      With a 96 cm (3.2 ft) length, this bike chain lock easily secures one or multiple bikes, and works well for gates, fences, scooters, and more.
    • Strong & Reliable Construction
      Made with a zinc alloy lock core, hardened steel chain, and durable ABS components, this lock is built for consistent performance and long-term use 
      Brand ROCKBROS
      Material Zinc alloy/ABS plastic
      Weight 420g
      Suitable for  Bicycles, electric bikes, motorcycles, glass sliding doors, etc.
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