Fox Suspension SLS Spring

The SLS (Super Light Steel) spring uses a proprietary alloy that allows for a thinner wire diameter and fewer coils. This design significantly reduces the overall mass, making it comparable to, or even lighter than, many titanium springs on the market.

Yes, the SLS spring is designed with a 35mm inner diameter, making it compatible with a wide range of coil shocks from brands including Marzocchi, DVO, MRP, and X-Fusion, in addition to Fox models.

The stress-relieving process is critical because it allows the thinner steel wire to maintain its structural integrity under high loads. It ensures the spring remains durable and resistant to fatigue despite the reduced material volume.

Spring rate selection depends on your rider weight, bike leverage ratio, and personal preference for suspension suppleness. We recommend using a spring rate calculator specific to your bike frame's kinematics to ensure you achieve the correct sag.

The stroke length indicates the maximum travel the spring can safely compress. You must ensure your shock's stroke does not exceed the spring's rating; if your shock has a shorter stroke, this spring will fit, but you should always verify your shock's specific hardware requirements.