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

Front spring purpose and handling

This 13mm front shock spring from Serpent, model 500908, is a scale tuning component for RC cars that alters front-end behavior by changing spring rate and static support. The spring is finished in blue and listed at 3.7lbs, which matters when selecting springs to refine handling rather than to change chassis strength.

Install this spring only in shock assemblies that accept 13mm diameter coils; confirm the spring seat diameter, preload collar fit, and shock shaft clearance before fitting. Standard shock service applies: remove oil and disassemble the unit if required, slide the spring onto the shock body, set preload using the collar, then reassemble while checking for smooth shaft movement.

Track setup notes: a firmer 3.7lbs front spring raises initial support and can help reduce nose dive under braking, while a softer coil improves compliance and traction on rough surfaces. Match spring swaps with damper oil and piston adjustments to maintain balanced handling, and change one variable at a time when testing.