FSA Energy Chainring 39T 90BCD 4-bolt 11-speed MFPN=BL21-0FS349LH-BK 3 and newer devices -

3 and newer devices - Not compatible with Android

Preserve and freshen your bike with Bike Protect’s water dispersing action

2 Bar Clamp Diameter (mm) 25

This eliminates axle flex improves ride quality and increases bearing longevity by reducing angular load while cornering or pedaling

7 inch up to 6

FSA Energy Chainring 39T 90BCD 4-bolt 11-speed MFPN=BL21-0FS349LH-BK 3 and newer devices -FSA Energy Chainring 39T 90BCD 4 bolt 11 speed. Full Speed Aheads Energy Modular Direct Mount Chainrings are designed for 2x road and gravel cranksets and feature shifting ramps and stainless steel pins on outer rings. Precision CNC machined AL7075 T6 Shifting ramps and stainless steel pins on outer rings Black anodized finish Laser etched logo Compatible with Modular cranksets