Heavy duty protection that screams back. The Bair Bikes Chain Lock with Alarm combines the uncompromising strength of a heavy-duty chain lock with a built-in motion sensitive alarm — delivering the ultimate in active, visible deterrence for electric bike riders who demand maximum security wherever they park.

While a standard chain lock offers solid passive protection, the addition of a built-in alarm takes your e-bike security to another level entirely. The moment someone attempts to lift, move, cut, or tamper with your chain, the alarm activates immediately — triggering a loud, attention-grabbing siren that sends opportunistic thieves running and alerts everyone nearby that something isn't right.

Built tough for daily outdoor use and engineered to withstand the harshest conditions — from coastal salt air and UV exposure to wet winter commutes — this is the chain lock for serious e-bike riders who park in public, high-traffic, or high-risk areas and refuse to compromise on the security of their investment.

Key Features:

• Built-in motion sensitive alarm — triggers a loud siren at the first sign of movement, lifting, or tampering
• Heavy duty hardened steel chain construction — resists cutting, sawing, bolt cutters, and leverage attacks
• Secure key lock mechanism — hardened anti-pick cylinder for maximum resistance to forced entry
• Generous chain length for securing e-bikes to a wide range of bike racks, poles, fences, and fixed structures
• Weatherproof construction — built to handle coastal conditions, rain, salt air, and UV exposure year-round
• Highly visible deterrent — the combination of heavy chain and alarm warning label discourages theft before it starts
• Compatible with all Bair Bikes e-bike models and most standard electric bikes

Chain Lock with Alarm vs Folding Lock with Alarm — Which Should I Choose? Both offer active alarm protection — the key difference is in the lock body. The Chain Lock with Alarm offers greater flexibility in length and securing options, making it ideal for locking to larger or more awkward structures. The Folding Lock with Alarm is more compact and easier to carry daily. For maximum overnight or high-risk security, use both together — a dual lock setup is the gold standard for serious e-bike theft prevention.

Who It's For: Daily e-bike commuters who park in busy public areas, urban riders in high-theft locations, overnight parkers, and anyone who wants the strongest possible chain-based security solution with the added active deterrence of a built-in alarm — because your Bair Bikes e-bike deserves nothing less than maximum protection.

Heavy chain, loud alarm, zero compromise — because your e-bike is worth fighting for.