This Serpent 500907 spring is specified as a 13mm coil with a 3.6lbs rate and pink finish, suitable for a variety of R/C shock assemblies. It is intended to function as a replacement spring where 13mm coils are required.
Installation notes: place the spring onto the shock shaft and seat it on the retainer consistent with your shock design, confirm there is no lateral movement or interference, and fine-tune preload to achieve balanced ride height.
Tuning role: a 3.6lbs spring raises stiffness, improving stability and controlling high-speed compressions; balance spring rate changes with damping and ride height for best results.
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