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The H&R 60mm I.D. race spring is a single 120mm main spring with a 240 N/mm (≈1370 lbs/in) rate intended for track and tuned suspension systems. Manufactured in Germany from (hf) 54SiCr6 lightweight spring steel, the 2.50" I.D. springs use thinner high‑tensile wire to deliver around 15% less mass and roughly 10% more travel compared with many competitors. H&R’s comprehensive 60mm program covers many lengths and rates and includes tender springs; main springs are pre‑blocked to prevent setting.
H&R 60mm ID Single Race Spring Length 120mm Spring Rate 240 N/mm or 1370 lbs/inch
