13mm Front Shock Spring Serpent 500909 3.8lbs Purple  [SER500909]

13mm Serpent 500909 spring details

The Serpent 500909 front shock spring is a 13mm-length coil rated at 3.8lbs and supplied in purple to complement vehicle styling. It is offered as an RC replacement part for front shocks that take 13mm springs on standard spring seats.

Compatibility: ensure your front damper assembly is designed for a 13mm spring and uses a standard inner-diameter seating. The spring affects front stiffness and should be used as part of a matched setup along with suitable shock oil and preload tuning.

Installation overview: remove the cap and shaft assembly, slide off the existing spring, place the Serpent 13mm spring onto the seat, set collar preload as needed, then reassemble the shock unit. Check that the shaft moves freely and the damper responds correctly after assembly.

Tuning role: switching to a 3.8lbs front spring raises front spring force relative to softer options, which reduces body roll and lessens front dive under braking while giving a firmer front sensation. Apply small increments of change and retest, adjusting oil and rebound to maintain a balanced setup.