This Serpent 500907 spring is an RC-scale shock spring specified as 13mm with a 3.6lbs rate and pink finish, intended for use in R/C general suspension setups. It serves as a replacement or spare where 13mm coil springs are required.
Installation notes: install the spring onto the shock shaft and seat it on the spring retainer according to your shock design, check that the spring runs true without binding before final assembly, and adjust preload gradually to reach the desired ride height and balance.
Tuning role: the 3.6lbs rate makes the suspension firmer compared with softer options, reducing roll and improving response on landings; apply small incremental changes and test drive to find the balance between traction and agility.
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