Yokomo YOKBMS12105 Rear Shock Spring SS12105  [YOKBMS12105]

Rear Shock Spring Overview

This is a rear shock spring intended for R/C suspension use and sold as a spare spring for rear shock assemblies. It is presented as an RC-scale accessory meant to be used in typical hobby car shock towers and cartridges where a compatible outer diameter and spring seat arrangement exist.

Functionally, the part acts as a coil spring to control rebound, compression and squat characteristics at the rear of the model; changing spring rate or preload will alter ride height, midstroke support and resistance to bottoming. Use this spring as part of a tuning set to balance chassis behaviour rather than as a single fix for handling issues.

Installation is standard for rear shock springs: remove the shock from the car, relieve preload, slide the spring onto the shock shaft and reposition retainers to achieve the desired preload. Inspect the shock shaft and eyelets for wear before reuse, and confirm free stroke after reassembly to ensure no binding occurs.

Practical tuning notes: adjust preload to change ride height and initial stiffness, swap springs of different rates to match track surface and driving style, and pair spring changes with damper oil and piston selections for consistent behaviour across the full travel.