
The H&R 60mm I.D. race spring is a single 120mm main spring with a 340 N/mm (≈1941 lbs/in) rate engineered for heavy‑duty tuning scenarios. Manufactured in Germany from (hf) 54SiCr6 lightweight spring steel, the 2.50" I.D. springs use thinner, high‑tensile wire to achieve about 15% less weight and near 10% more travel than many competitors. H&R offers a broad selection of lengths and rates plus tender springs; main springs are pre‑blocked at the factory to resist sagging.
H&R 60mm ID Single Race Spring Length 120mm Spring Rate 340 N/mm or 1941 lbs/inch