H&R RF075-36-350LBS 36mm ID Race Spring 350 lb/in Linear Rate

The H&R RF075-36-350LBS is a linear-rate race spring engineered for high-performance motorsport and track-day applications. Built to H&R's exacting German engineering standards, this spring delivers consistent, predictable handling characteristics under the extreme loads and repeated compression cycles demanded by competitive racing environments.

With a 36mm inner diameter and a 350 lb/in spring rate, this race spring is designed for use with compatible coilover shock absorbers and race suspension platforms that utilize industry-standard 36mm ID fitments. The linear spring rate ensures a direct, one-to-one relationship between suspension travel and resistance force, giving drivers precise, consistent feedback throughout the full range of suspension movement.

Key Features:

• Spring Rate: 350 lbs/in — linear rate for consistent, predictable response
• Inner Diameter (ID): 36mm — compatible with standard 36mm coilover shafts and perches
• Application: Race and high-performance motorsport use
• Construction: High-tensile spring steel with H&R's proprietary cold-winding process for fatigue resistance
• Finish: Corrosion-resistant coating for durability under race conditions
• Design: Linear progressive winding for uniform compression characteristics

H&R race springs are manufactured in Germany and are a trusted choice among professional racing teams and serious track enthusiasts worldwide. The RF075-36-350LBS is ideal for building or tuning a coilover suspension setup where precise spring rate selection and dimensional accuracy are critical to performance.