Serpent 500908 Blue 13mm Front Shock Spring 3.7lbs  [SER500908]

Choosing the correct front spring

The Serpent 500908 front spring is a 13mm coil designed for setup work on RC cars; its 3.7lbs rate and blue finish are tuning details that influence ride support and handling feel, not chassis strength. Select springs to match your driving surface and desired front response.

Fit this spring in shocks specified for 13mm springs only. Check that the spring seats, preload collar, and shock shaft clearances are compatible before installation. Standard shock maintenance applies: remove oil if necessary, strip the shock, place the spring over the body, set preload with the collar, then reassemble while confirming smooth shaft operation.

Practical notes: a firmer front spring reduces dive and sharpens turn-in, while a softer spring helps maintain traction over bumps. Balance spring swaps with damper oil and piston tuning, and adjust settings one change at a time to evaluate impact on lap performance.