HPI Baja BJ186f Steel Shock Shaft by GPM BJ186F/SH  [BJ186F/SH]

Shock shaft for Baja BJ186f

This GPM aftermarket steel shock shaft is produced for the HPI Baja BJ186f platform and supplied under model BJ186F/SH, intended as a direct replacement shaft for RC-scale Baja shock assemblies.

Use this shaft when rebuilding or upgrading a shock: disassemble the shock body, remove the original shaft and internal components, inspect seals and bearings, then install the GPM steel shaft while maintaining recommended shock oil and spacer stack for your setup.

Technically the part serves to keep the piston and shock rod aligned, resist bending during heavy off-road use, and provide a consistent sliding surface that reduces binding during tuning changes; handle as an RC accessory only.