R12/GT Titanium Rear Shock Shaft and Piston - Yokomo R12-18SRT  [R12-18SRT]

Durability-focused titanium piston shaft for R12/GT

This replacement rear shock shaft and piston is intended for use with the Yokomo R12/GT series as an aftermarket accessory for RC touring cars. The shaft is finished with a titanium coating to resist scratches and lower friction at the O-ring interface, helping to extend service intervals and reduce wear-related damping changes.

Installation guidance: remove the original piston shaft and install the R12-18SRT in the same orientation through the damper body and seal stack. Make sure the O-ring seats correctly and that the piston travels freely before completing assembly. Use the correct shock oil and follow your normal damper service steps for R12/GT units.

Durability effect: the tougher shaft surface reduces micro-abrasion around the O-ring and helps maintain consistent damping over many runs. Note that internal piston geometry and hole sizing are unchanged, so tuning choices remain based on piston type and oil weight.