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The H&R 60mm I.D. race spring, 80mm long with a 20 N/mm (114 lbs/in) rate, is manufactured from special lightweight (hf) 54SiCr6 spring steel. H&R's material and precision processes let them use thinner wire for reduced mass and about 10% more travel than many competitors. Each spring is factory pre‑blocked to avoid permanent set or sag, and the broad 60mm program supplies multiple lengths and rates for custom tuning in motorsport and high‑spec street applications.
H&R 60mm ID Single Race Spring Length 80mm Spring Rate 20 N/mm or 114 lbs/inch
