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The H&R 60mm I.D. race spring is a single 120mm main spring with a 180 N/mm (≈1027 lbs/in) rate made for aggressive track and tuning applications. Built in Germany from (hf) 54SiCr6 lightweight spring steel, these 2.50" I.D. springs allow a thinner, high‑tensile wire that reduces weight by about 15% and increases travel by roughly 10% versus many competitors. H&R offers wide length and rate choices and matching tender springs; main springs arrive pre‑blocked to prevent sag.
H&R 60mm ID Single Race Spring Length 120mm Spring Rate 180 N/mm or 1027 lbs/inch
