The RockShox Coil Spring X-Firm Black is designed for riders seeking maximum resistance and support on demanding trails. Its an ideal upgrade for heavier riders or those who prefer a stiffer suspension setup.

X-Firm Spring Rate for Weight Support: Engineered to support riders weighing over 90 kg, the X-Firm coil provides added firmness for aggressive riding, improved handling and better performance during big hits and landings.

Compatible with Domain & BoXXer Forks: This spring is a direct fit for Domain Dual Crown A1A3 (20072017) and BoXXer Race, RC, Team and R2C2 models (20102018) with 35 mm stanchions. It delivers optimal preload and travel response for these fork systems.

Durable Construction and Performance: Built to withstand harsh riding conditions, the spring features high-tensile steel construction and precise compression characteristics, ensuring consistent feel and long-term reliability.

Whether you’re hitting steep descents or rugged freeride terrain, this X-Firm spring delivers the controlled, predictable performance you need to push your limits.