Solid power transfer for your drivetrain: Bosch chainring spider

When fitting a new chainring or servicing your e-bike crankset, this genuine Bosch spider secures your chainring firmly to the mid-drive motor. Built to handle high motor torque, it maintains a precise chainline so every pedal stroke transfers power smoothly to the rear wheel.

• Wide compatibility: Fits Bosch Performance Line Speed, Cargo Line, CX, and BDU37YY/BDU4XX motors
• Secure fitment: Prevents chainring flex and maintains correct chain alignment under heavy loads
• Durable construction: Crafted from robust alloy for long-lasting reliability in all conditions

Get your drivetrain refreshed and enjoy smooth, reliable power delivery on every ride.