This hard-rate spring is a direct replacement for X-type shock assemblies used on Yokomo R12 and GT series vehicles, constructed from steel wire to increase spring stiffness. It changes how the car responds by raising spring rate while leaving shock bodies and pistons unchanged.
Use the spring when you need a straightforward stiffness adjustment during setup or practice. Packed as individual spring pcs for hobbyists tuning the models below.
Compatible chassis:
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