Yokomo R12-37SS Soft Spring for R12/GT X-Shock  [R12-37SS]

Fine-tune shock response with R12-37SS

The Yokomo R12-37SS is a soft-rate replacement coil made for X-style shocks on R12 and GT series 1/10-scale RC platforms. It is intended as a tuning item to soften initial compression and modify rebound feel, enabling more precise chassis balance control while keeping existing shock pistons and oil unchanged.

Basic installation is quick for anyone familiar with shock maintenance: take off the shock cap and spring retainer, remove the current spring, fit the R12-37SS ensuring correct seating on the shaft, then reassemble and confirm preload. A steady bench and common shock tools make the job faster and safer.

On the track the softer spring often delivers:

• Better mechanical traction on slippery surfaces through increased initial compliance.
• A smoother response over small undulations for improved mid-corner stability.
• Compatibility with reduced preload or softer oil to dial in roll and turn-in characteristics.

Choose this spring when you want smoother weight transfer and a more progressive suspension feel after other setup items like anti-roll bars and ride height have been adjusted.

Compatibility

• GT5-R2
• GT5-RS2
• GT5-R35
• GT5-SC430
• GT3-REA
• GT3-IS350
• GT3-B4
• GT3-CAX
• GT3-BRZ
• GT3-AHP
• GT-B
• YR-R12C3
• YR-R12C31
• YRF-001RF
• YRF-001W