This is an RC-scale hard replacement spring designed for X-type shock assemblies used on Yokomo R12 and GT series chassis. It serves a specific tuning role: increasing suspension spring rate to alter handling balance and roll characteristics without changing shock bodies or pistons.
Use this spring when you need a straightforward stiffness change during setup sessions. It is packaged as individual spring pcs and intended for hobby and track tuning of the listed chassis models.
Compatible chassis:
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