Fox Suspension SLS Spring

The SLS (Super Light Steel) spring uses a proprietary alloy that allows for a smaller wire diameter and fewer coils. This design significantly reduces weight, making it comparable to or lighter than titanium options while maintaining the durability of traditional steel.

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

The proprietary surface treatment and stress-relieving process are engineered to increase the spring's fatigue life. This ensures the component maintains its performance characteristics and structural integrity over a longer lifespan compared to untreated steel springs.

Spring rate is highly dependent on your rider weight, bike leverage ratio, and personal suspension preference. You should consult your specific bike frame's suspension setup guide or use a spring rate calculator to ensure 475lbs is the correct weight for your setup before purchasing.

No, the stroke length is critical. You must match the spring's stroke to your shock's stroke length. A spring with a 2.4-inch stroke is designed for shocks with a stroke of 2.4 inches or less; using it on a shock with a longer stroke could lead to coil bind and damage.