Fox SLS Coil Spring

The SLS (Super Lightweight Steel) spring uses a specialized alloy that allows for less material while maintaining structural integrity. This results in a significantly lower weight than a traditional steel spring, offering a performance feel closer to titanium without the high cost.

This spring features a 35mm inner diameter, making it compatible with a variety of high-performance shocks, including those from DVO, MRP, and X-Fusion. Always verify your shock's specific spring requirements and stroke length before purchasing to ensure a proper fit.

The 93mm stroke indicates the maximum amount of compression the spring is designed to handle safely. You must ensure your shock's stroke length is equal to or less than this 93mm rating to prevent the spring from binding or bottoming out prematurely.

Spring rate selection depends entirely on your rider weight, bike leverage ratio, and personal preference for suspension firmness. We recommend using a spring rate calculator specific to your bike frame's kinematics to determine if 300 lbs is the correct starting point for your setup.

Reducing unsprung weight—the weight not supported by the suspension—can improve your bike's small-bump sensitivity and responsiveness. While the difference is subtle, it helps the rear wheel track the ground more effectively over technical, chatter-heavy terrain.