H&R RF130-36-025 36mm ID Race Spring 5.12in Length 143 lbs/in

The H&R RF130-36-025 is a high-performance 36mm inner diameter race spring engineered for serious motorsport and coilover suspension applications. Manufactured in Germany, this spring is built from special lightweight (hf) 54SiCr6 spring steel, delivering exceptional tensile strength while reducing overall weight compared to conventional spring steel alternatives.

This is a main spring featuring a linear spring characteristic that defines the primary handling behavior and end-rate progression of your suspension setup. The factory pre-blocking process ensures the spring will never set or sag over time, maintaining consistent performance through demanding motorsport environments.

Key Specifications:

• Inner Diameter (I.D.): 36mm
• Free Length: 5.12 inches (130mm)
• Spring Rate: 143 lbs/inch (25 N/mm)
• Block Height: 1.89 inches
• Load at Block: 461 lbs
• Weight: 0.52 lbs

Key Features:

• Crafted from premium 54SiCr6 high-tensile spring steel for reduced weight and maximum travel
• Factory pre-blocked — will never set or sag under sustained load
• Linear spring rate for predictable, consistent suspension response
• Part of H&R's comprehensive 36mm I.D. race spring lineup with rates ranging from 72 to 686 lbs/inch
• Designed for demanding motorsport and performance coilover applications
• Precision manufactured in Germany to strict motorsport tolerances

The H&R RF130-36-025 is sold individually and is compatible with coilover systems accepting a 36mm inner diameter spring. It pairs with H&R's 36mm tender/helper springs for fine-tuned suspension setups requiring additional rebound travel or spring rate progression.