ARRMA ARA320737 Bumper Springs

This ARRMA bumper spring pair provides the two springs that let the Mojave 4S bumper system absorb impacts. Rather than mounting the bumpers rigidly, ARRMA's desert-truck design lets them deflect against spring pressure — the bumper gives way in a hit, the spring pushes it back into position, and the crash energy never reaches the chassis at full force.

Both springs are wound to the factory rate, so bumper action stays consistent side to side. Springs that have been through enough front-end hits take a set and lose their return force, leaving the bumper drooping or slow to reset.

A fresh pair restores the self-resetting bumper action that makes the Mojave shrug off impacts that would break rigid-bumper trucks.

Fitment is the ARRMA Mojave 4S platform, pairing with the F/R bumper set (ARA320738) — confirm against your exploded parts diagram. The package includes two bumper springs.