Serfas E-Lume 30 Tail Light Bike Accessories Brand_Greenfield com Direct Mount technology includes

com Direct Mount technology includes a clever spline interface between the crank arm and chainrings for superior stiffness and direct transfer of your pedaling torque

and real-world riding of prototypes

while the 10° ramp angle provides a smooth transition to modern shifter hoods

SuperFlow technology drastically reduces all physical limitations caused by prolonged pressure in the perineal area

Serfas E-Lume 30 Tail Light Bike Accessories Brand_Greenfield com Direct Mount technology includesFeatures: 30 Lumen Max Output 4 LED Chip Finned Lens Design Provides 270 Degree Visibility Blue LED Charge Indicator Daytime Flash Mode Up To 34 Hours Runtime Micro USB Rechargeable