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The H&R 60mm I.D. race spring is a single 120mm main spring rated 300 N/mm (≈1712 lbs/in) for serious suspension tuning. Produced in Germany from (hf) 54SiCr6 lightweight spring steel, the 2.50" I.D. springs permit thinner high‑tensile wire, delivering roughly 15% less weight and about 10% more travel than many competing springs. H&R’s comprehensive 60mm lineup offers extensive lengths and rates and optional tender springs; main springs arrive pre‑blocked to prevent sag.
H&R 60mm ID Single Race Spring Length 120mm Spring Rate 300 N/mm or 1712 lbs/inch
