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The H&R 60mm I.D. race spring is a single 120mm main spring with a 130 N/mm (≈742 lbs/in) rate aimed at precise tuning for track and high‑load applications. Made in Germany from (hf) 54SiCr6 lightweight spring steel, the 2.50" I.D. design uses thinner high‑tensile wire for about 15% less weight and approximately 10% more travel versus many competitors. H&R supplies many lengths and rates and optional tender springs; all springs are pre‑blocked to avoid sag.
H&R 60mm ID Single Race Spring Length 120mm Spring Rate 130 N/mm or 742 lbs/inch
