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The H&R 60mm I.D. race spring is a single 120mm main spring rated 140 N/mm (≈799 lbs/in), intended for demanding tuning setups. Crafted in Germany from (hf) 54SiCr6 lightweight spring steel, the 2.50" I.D. springs allow thinner wire for roughly 15% less weight and about 10% more travel than many alternatives. H&R offers an extensive selection of lengths and rates and optional trapezoidal tender springs; factory pre‑blocking prevents permanent set or sag during use.
H&R 60mm ID Single Race Spring Length 120mm Spring Rate 140 N/mm or 799 lbs/inch
