Description
Upgrade your mountain biking experience with the FOX Steel Rear Shock Coil Spring – a premium, high-performance component engineered for durability, reliability, and optimal ride quality. Designed specifically for enduro, trail, and all-mountain riders, this 400 lb. x 3.65″ spring delivers precise tuning and enhanced shock responsiveness across diverse terrains.
Materials & Construction:
Crafted from high-grade steel, the FOX Steel Coil Spring ensures exceptional strength and resilience. Its ultra-durable black powder-coat finish provides corrosion resistance and a sleek, professional look, maintaining its appearance even after harsh rides and exposure to the elements.
Performance & Engineering:
With a spring rate of 400 lbs/in and a total length of 7.750 inches, this spring offers a balanced mix of support and suppleness, perfect for aggressive trail riding or steep descents. The 3.5-inch stroke guarantees smooth compression and rebound, optimizing shock performance and rider control over rugged terrain. The precise internal diameter of 35 mm (1.385 inches) ensures compatibility with a variety of shock brands.
Components & Technology:
This standard steel coil spring is designed to fit FOX, DVO, MRP, and X-Fusion shocks with an internal diameter of 35 mm, accommodating a wide range of suspension setups. Marked with clear spring weight and total travel specifications, it simplifies setup and tuning for riders seeking consistent geometries and reliable suspension performance.
Style & Use Case:
Ideal for trail riding, enduro racing, and mountain adventures, the black styling adds a sleek aesthetic to your suspension system. Its versatility makes it suitable for various riding styles, providing the support needed for technical climbs and bold descents. Whether you’re customizing your existing shock or replacing a worn spring, this coil offers superior durability and responsiveness.
Innovative & Differentiating Features:
– All standard FOX steel springs feature marked spring rates (lbs/in) in 50 lb increments for easy identification.
– The black powder-coat finish enhances durability and ensures long-lasting performance in challenging riding conditions.
– Designed to be paired with shocks traveling less than the spring’s marked travel, ensuring compatibility and safety during aggressive riding.
Specifications:
– Spring Weight: 400 lbs/in
– Total Spring Length: 7.750 inches
– Stroke Length: 3.5 inches
– Material: Steel
– Internal Diameter: 35.2 mm
Upgrade your suspension with the FOX Steel Rear Shock Coil Spring – engineered for precision, built to last, and optimized for mountain biking enthusiasts seeking top-tier performance. Maximize your ride, improve shock responsiveness, and conquer any trail with confidence.
- Premium Steel Construction: Crafted from high-quality steel with a durable black powder-coat finish, this FOX rear shock coil spring offers exceptional strength, corrosion resistance, and long-lasting performance on rugged mountain trails and downhill rides.
- Optimized Spring Rate and Travel Performance: Designed with a 400 lb. spring rate and 3.65″ travel, this spring provides precise damping support, enhancing shock responsiveness and stability for aggressive riding and technical terrain handling.
- Universal Fit and Compatibility: Featuring a 35mm/1.385″ internal diameter, this coil spring easily fits FOX, DVO, MRP, and X-Fusion shocks, making it a versatile upgrade or replacement for a wide range of mountain bike suspension systems.
- Enhanced Durability and Style: The ultra-durable black powder-coat finish not only offers excellent protection against dirt, mud, and impacts but also maintains a sleek, professional look for your bike’s suspension system.
- Performance-Driven Engineering: Engineered with accurate spring markings (400 x 3.65) and built for shocks with travel less than the spring’s marked travel, this coil spring guarantees reliable compression support, improved shock performance, and rider confidence on tough trails.
| Stroke (ins) | 3.5 |
| Material | Steel |
| I.D. (mm) | 35.200000000000003 |
| Spring Weight | 400 |






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