6865 Front, +20% Rate

Traxxas 6865 Rear Progressive Springs are a pair of progressive‑rate shock springs with a -20% rate (softer than stock) designed to work with the Ultra or Big Bore rear shocks on various Traxxas 1/10‑scale 4×4 models; they help improve suspension compliance over small bumps while still absorbing harder landings, making them ideal for tuning ride feel and handling on trucks like Slash 4×4, Stampede 4×4, Rustler 4×4, Hoss 4×4, and similar vehicles.