FSA

Bosch Gen4 Chainring + Spider, 38T, 104BCD

FSA Bosch Gen4 Chainring + Spider, 38T, 104BCD delivers reliable performance for riders looking to refresh or fine-tune their Bosch eBike drivetrain. Designed by Full Speed Ahead (FSA) for Bosch’s Generation 4 motor system, this chainring and spider combination maintains precise power transfer and consistent chain engagement under high torque loads common to eMTBs and high-performance e-commuter setups.

With its 38-tooth configuration and 104 BCD interface, it provides a balanced gear ratio for both efficient climbing and smooth cruising. The integrated spider ensures alignment and strength, reducing wear while maintaining quiet, efficient operation. Built from durable materials and engineered for the unique demands of eBike drivetrains, it’s a dependable upgrade or replacement for riders who expect long-lasting performance.

• Designed for Bosch Gen4 drive units for perfect system compatibility
• 38T chainring with 104 BCD offers an optimal mix of torque and cadence
• Strong, precisely machined construction for durability and chain stability
• Includes integrated spider for straightforward installation and secure fit
• Ideal for eMTB and performance e-commuter applications