H&R RF075-36-300LBS 36mm ID Race Spring 300 lbs/in Single

The H&R RF075-36-300LBS is a single 36mm inner diameter race spring engineered for high-performance coilover suspension applications. Crafted from special lightweight 54SiCr6 spring steel, this spring delivers consistent, predictable performance in the most demanding motorsport environments.

Key Specifications:

• Inner Diameter (I.D.): 36mm
• Free Length: 2.95 inches
• Spring Rate: 300 lbs/inch
• Block Height: 1.44 inches
• Load at Block: 454 lbs
• Weight: 0.40 lbs (per spring)

Key Features:

• Manufactured from premium 54SiCr6 spring steel for lightweight strength and durability
• Factory pre-blocked — will never set or sag under repeated compression
• Compatible with H&R's full 36mm I.D. motorsport coilover spring lineup, including available tender springs for fine-tuning
• Part of the H&R Motorsport line offering spring rates from 72 to 686 lbs/inch and lengths from 2.76" to 5.12"
• Sold as a single spring — order quantity as needed for your application

This H&R 36mm race spring is ideal for motorsport builders and suspension tuners who need precise spring rates with a compact free length. The pre-blocked construction ensures long-term consistency and zero performance degradation over time.