Precision Bike Rear Drum Brake Expansion Brake Abs Bike Lock 4 Magnet Sensing

ABSS3725 is the 4-magnet 95 mm version in the Lofandi ABSS anti-lock expansion brake lock series. ABSS3725 should not be positioned only as another lightweight 95 mm model. Its upload difference is the 4-magnet evenly distributed speed sensing layout. The first paragraph should make this SKU difference visible, because the backend screenshots show that long combined titles can blur the distinction between ABSS3716, ABSS3725 and ABSS3708.

The ABSS series is designed for shared e-bike and fleet mobility platforms that need rear-wheel locking, rear brake integration, smart electronic control and safer anti-lock logic in one assembly.

• 95 mm anti-lock expansion brake lock for rear-wheel shared e-bike applications.
• >=160 N.m torque resistance positioning for this SKU.
• 4 Magnets / Ring, Evenly Distributed 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 ABSS3725, the speed sensing configuration is 4 magnets / ring, evenly distributed. 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.

• Shared e-bikes and rental bicycles requiring rear wheel brake-lock integration.
• Fleet mobility vehicles using controller, IoT or battery-side smart lock control.
• OEM projects where rear hub left-side or rear motor left-side installation is available.

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.