Vortex Rear Sprocket For Marchesini Wheels

100% CNC machined with saber grooves. Vortex patent pending design. Available in silver or PTFE black hardcoat, which bonds to the aluminum to create a more durable surface with less friction. 7075 T6 billet aluminum, lightweight for less rotating mass. Improved acceleration, deceleration and directional changes. 39-48 tooth. 10.5MM diameter. For use with 10-spoke Marchesini wheels.