E-bike Sprocket FSA Bosch Gen2 Offset 2.5mm 20T WA138 Black

E-bike Sprocket FSA Bosch Gen2 Offset 2.5mm 20T WA138 Black

The FSA WA138 sprocket is designed for e-bikes equipped with the Bosch Gen2 motor system. This 20-tooth sprocket is an important drivetrain component, helping ensure stable chain movement, secure engagement and smooth power transfer under the higher loads typical of electric bikes.

The 2.5 mm offset makes this model suitable for achieving the correct chainline on bikes with both Standard and Boost148 setups. This makes the FSA WA138 a practical choice for servicing compatible Bosch Gen2 e-bikes, replacing a worn sprocket or refreshing the drivetrain.

Made from heat-treated stainless steel, the sprocket offers strong wear resistance, durability and dependable performance for regular use. The ED black finish gives the component a clean and technical appearance that fits well with modern electric bike drivetrains.

• Product: e-bike sprocket
• Brand: FSA
• Model: WA138
• Compatibility: Bosch Gen2 motor system
• Teeth: 20T
• Offset: 2.5 mm
• Fit: Standard and Boost148
• Material: heat-treated stainless steel
• Colour: ED black