Yokomo RD-631 - Aluminium Top Shaft 20T / 48P Gear for RD/SD/MD

Yokomo - RD-631 - Aluminium Top Shaft 20T / 48P Gear for RD/SD/MD

This is an aluminum top shaft compatible with the RD, SD, and MD series. It is compatible with the conventional top shaft (Y2-631), but the D-cut section on the shaft has been widened to allow for the installation of lightweight spur gear hubs (RD-630BK/630BL/630P/630R).