FSA E-Bike Bosch Gen4 Direct Mount Chainring Spider

The FSA E-Bike Bosch Gen4 spider is the 4-arm support for mounting the chainring on your e-bike with a Bosch Gen4 Direct Mount motor. Use it to renew or change the drivetrain.

• Fits Bosch Gen4 Direct Mount motors without adapters
• Forged 6061 aluminium, strong enough for an electric motor's power
• Black anodised and sandblasted finish for improved wear resistance
• Chainring bolt circle diameter (BCD) of 104 mm with 4 arms, for compatible chainrings
• Choose the variant according to chainline (50, 53 or 55 mm) and 1x12 or steel chainring

Technical specifications

• Type: 4-arm chainring spider, Direct Mount
• Material: forged 6061 aluminium
• Bolt circle diameter (BCD): 104 mm, 4 arms
• Finish: sandblasted, black anodised
• Chainline: 50 mm, 52 mm, 55 mm
• Motor compatibility: Bosch Gen.4 (Direct Mount)
• Variants: 55mm 1x12 W0172, 50mm 1x12 W0151, 53mm 1x12 W0152, 53mm 1x steel W0147, 50mm 1x steel W0146
• Package contents: 1 FSA chainring spider for Bosch Gen.4