H&R HRF070-36-120 36mm ID Race Spring 2.76in Length 686 lbs/in

The H&R HRF070-36-120 is a high-performance 36mm I.D. race spring engineered for serious motorsport and track applications. With a free length of 2.76 inches (70mm) and a spring rate of 686 lbs/inch (120 N/mm), this spring delivers precise, consistent performance at the limit.

Crafted from special lightweight (hf) 54SiCr6 silicon-chrome spring steel, H&R race springs use an extremely high-tensile-strength wire alloy that allows for a thinner wire cross-section — resulting in reduced unsprung weight without sacrificing load capacity. Every spring is pre-blocked at the factory, ensuring the spring will never set or sag under repeated high-load conditions.

Key Specifications:

• Part Number: HRF070-36-120
• Inner Diameter: 36mm (1.42 in)
• Free Length: 70mm (2.76 in)
• Spring Rate: 120 N/mm / 686 lbs/in
• Block Height: 1.26 in (32mm)
• Load at Block: 1,025 lbs
• Weight: 0.44 lbs
• Material: (hf) 54SiCr6 Silicon-Chrome Spring Steel
• Quantity: Sold individually (single spring)

Features & Benefits:

• Factory pre-blocked — will never set or sag under race conditions
• Lightweight high-tensile alloy steel for reduced unsprung weight
• Precision-wound for consistent spring rate throughout compression travel
• Compatible with standard 36mm I.D. coilover and race damper applications
• 100% manufactured in Germany to strict motorsport tolerances
• Part of H&R's most comprehensive 36mm I.D. race spring program, ranging from 2.76" to 5.12" free length and 72 to 686 lbs/in spring rates

Whether you're tuning a club racer, time attack build, or full competition vehicle, the H&R HRF070-36-120 provides the precision spring rate and durability demanded by professional motorsport. Sold as a single spring.