Expansion Lock Bike Rear Drum Brake Shared 110mm E Bikes Bicycle Brake Lock

The Heavy Duty Anti-Lock Rear Drum Brake Lock is designed for shared e-bikes, fleet vehicles and urban mobility platforms that require a larger brake lock structure and stronger torque resistance. The ABSS3708 version uses a 110 mm drum brake lock design, making it clearly different from the 95 mm ABSS3716 and ABSS3725 models.
This product integrates rear brake locking, electronic control, speed sensing and mechanical anti-lock protection into one assembly. It supports 5V–60V DC voltage input and communication through UART, RS485, CAN and I2C, making it suitable for connected mobility systems that require remote lock control and vehicle status management.
With ≥300N·m torque resistance, 3-magnet speed sensing and IPX7 lock-core waterproof protection, ABSS3708 is positioned for heavier-duty rear wheel security applications. It is suitable for shared e-bike fleets that require stronger mechanical protection, larger brake diameter and reliable operation in outdoor environments.

• 110 mm anti-lock expansion brake lock for rear-wheel shared e-bike applications.
• >=300 N.m torque resistance positioning for this SKU.
• 3 Magnets / Ring speed sensing to support wheel movement detection.
• Patented mechanical Anti-lock protection helps reduce unsafe locking risk.
• Integrated expansion brake and smart electronic lock control.
• IPX7 lock-core waterproof protection for outdoor fleet operation.
• High-strength metal die-cast protective structure for anti-tamper durability.
• OTA online upgrade support for connected mobility platforms.

The structure diagram should be translated into product value, not treated only as a picture. The visible components include the lock-core assembly, waterproof cable, Hall sensor, brake block assembly, lock pin, swing arm and return spring.
In operation, the lock disc is connected with the hub. The lock piece and lock pin mechanism control locking action, while the expansion brake structure keeps the rear braking function integrated in the same rear-wheel area.
For ABSS3708, the speed sensing configuration is 3 magnets / ring. This sensing input supports vehicle-side judgment before locking and works together with the mechanical Anti-lock protection to reduce unsafe locking risk while the wheel is moving.

ABSS3708 is suitable for shared e-bikes, rental bicycles and fleet mobility vehicles that require stronger rear-wheel lock protection and a larger brake lock structure. It is especially useful for vehicle platforms where 110 mm brake diameter and high torque resistance are required.
For shared mobility operators, ABSS3708 provides stronger rear-wheel anti-theft protection, speed-aware locking logic and outdoor-ready waterproof performance. For OEM vehicle brands, it offers a heavy-duty rear drum brake lock option that can be matched to different controllers, IoT systems and vehicle frame structures.

Before sampling or production, confirm the rear wheel structure, brake diameter, axle hole size, installation clearance, controller communication protocol, speed protection logic, waterproof requirement and target market compliance documents.