FSA

W0134 Bosch Gen 4 Spider BCD104 50mm Chainline

The FSA W0134 Bosch Gen 4 Spider BCD104 50mm Chainline is built to handle the extra torque and demands of modern eBike power systems. Designed specifically for Bosch Gen 4 motors, this alloy spider offers a precise fit and reliable performance that keeps power transfer smooth and consistent on every ride.

With a balanced approach to stiffness, weight, and durability, the FSA W0134 Spider ensures efficient pedaling response without unnecessary bulk. Its 50mm chainline provides ideal drivetrain alignment for better shifting and reduced wear, making it a smart upgrade or replacement part for riders who expect dependable performance from their eBike drivetrain.

• Compatible with Bosch Gen 4 motors for a precise, secure fit
• BCD104 mounting pattern works with a wide range of chainrings
• 50mm chainline delivers optimal drivetrain alignment and smooth power transfer
• Durable alloy construction balances strength and weight for eBike-level performance
• Engineered to handle the torque and load of high-power eBike systems