Yokomo YOKRP-077 Progressive Ultra Shock Spring Set 3.0 - 3.2  [YOKRP-077]

Variable-rate springs for RC shocks

This Yokomo RP-077 Progressive Ultra Shock Spring set is an RC-scale accessory designed to alter suspension response through a progressive-rate coil profile. The springs change shock compression and rebound behavior, giving a rate that stiffens as travel increases to manage mid and high travel without stating chassis compatibility.

Installation is straightforward for standard coil-over shock assemblies: remove the shock end cap and spring retainer, swap the factory spring for the progressive unit, and reassemble while checking preload and travel. No special tools beyond standard shock disassembly tools are required, and common practice is to set preload and ride height incrementally while evaluating handling.

In tuning, progressive springs are used to soften initial compliance for small bumps while resisting bottoming under heavy compression. Select spring choice based on damping and surface conditions rather than vehicle make or model to get the best balance.