Yokomo YOKR12-37SS Soft Shock Spring with Heat-Treated Wire  [YOKR12-37SS]

Heat-Treated Coil for 1/10 Shocks

The Yokomo YOKR12-37SS X Shock Soft Spring is an RC shock spring for 1/10 scale electric touring and on-road vehicles. Constructed from heat-treated steel wire, it provides a softer baseline option to increase suspension compliance and improve traction on low-grip layouts.

As a soft, general-purpose spring it affects ride height, weight transfer and transient response while leaving other shock components unchanged. Fit these springs into your current shock bodies and use the same oil and pistons initially to assess handling changes. Because spring rate interacts with preload, you may need to alter collars or spacers to restore ride height after installation.

The spring is designed for broad compatibility with common shock assemblies that accept standard-length coil springs. Confirm internal shock travel and retainer clearance before long runs. Use the springs progressively while monitoring steering feel and mid-corner balance.