LD-021 Heavy Duty U-Lock Motorcycle Bicycle Security Lock | Factory Wholesale Supplier

This heavy duty U-lock delivers maximum security for motorcycles, bicycles, and electric scooters in urban parking environments. The 45# hardened steel shackle heat-treated to HRC 55-62 provides true cut resistance that standard mild steel U-locks cannot match, forcing thieves to resort to noisy angle grinders rather than quiet bolt cutters.

The double-locking mechanism secures both shackle legs independently, eliminating the single-point vulnerability that makes ordinary U-locks susceptible to pry bar attacks. The 7-pin anti-drill brass cylinder with hardened steel pins resists drilling, picking, and bumping techniques commonly used by thieves. A silicone dust cover seals the keyway against rain, dust, and road debris, extending cylinder life in outdoor exposure. The included mounting bracket with rubber lining attaches securely to round and oval frame tubes from 25mm to 40mm diameter, keeping the lock accessible during rides without rattling or frame damage. OEM branding, custom shackle clearances for fat bikes, and smart alarm/Bluetooth options support wholesale and retail distribution programs.

• Hardened steel shackle HRC 55-62 resists bolt cutters and hacksaws
• Double-locking mechanism secures both shackle legs for maximum pry resistance
• Anti-drill brass cylinder with 7-pin tumblers prevents picking
• Silicone dust cover protects keyway from water and debris
• Rubber bumper coating prevents frame scratches
• Mounting bracket included for bike frame attachment

• Motorcycle and scooter parking security
• Bicycle commuting and urban cycling
• Electric bike and e-scooter anti-theft
• Gym and school bike rack locking
• Commercial bike share station security

• 45# hardened steel (not Q235) achieves HRC 55-62 for true cut resistance
• Double-locking (not single-locking) both legs resist pry bar attacks
• 7-pin anti-drill cylinder exceeds standard 5-pin designs
• Silicone keyway cover (not plastic) seals out rain and dust
• Custom shackle clearance for fat bike and motorcycle forks
• Mounting bracket with rubber lining prevents frame damage