Serpent 500914 Shock 13mm spring rr pink 2.1lbs  [SER500914]

Rear shock spring for tuning

This is a rear shock spring intended for RC-scale suspension tuning, specified as 13mm with a 2.1lbs spring rate and a pink finish. The component is a dedicated spring for the rear (rr) position and is used to alter ride height, initial stiffness, and weight transfer behaviour in small-scale RC cars.

Compatibility guidance: this spring is suitable where a 13mm diameter coil spring is required for rear shock assemblies. Do not assume fitment with proprietary spring retainers or non-standard shock designs without checking physical dimensions; confirm inner diameter and seat type on your shocks before installation.

Installation notes: remove the shock from the chassis, compress the shock body to relieve preload, and swap springs while noting orientation and spring seats. Reassemble and set initial preload so the spring engages the shock caps without excessive compression at static ride height. After installation, test roll and adjust preload in small increments to reach the desired balance between traction and roll stiffness.

Tuning role: a 2.1lbs rear spring increases rear roll stiffness compared with softer rates, which can reduce rear squat under acceleration and change mid-corner balance. Use this spring in combination with damper oil viscosity and shock piston choices to achieve the target damping response rather than relying on spring changes alone.