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Ships within 48 hours · Estimated delivery Oct 30 - Nov 4
325 lbs/in Barrel Type
70mm ID Adapter kit comes with an adapter and 2 metal washer sheets (1 kit for 1 spring)
7 inch length
300 lbs/in Barrel Type
625 lbs/in
Swift Flat Wire Linear Rate Bump Springs 600 lbs/in Flat Track Motorcycle Springs 325 lbs/in Barrel TypeFlat Wire Linear Rate Bump Springs 600 lbs in Swift Bump Springs are made from a proprietary material. The same springs are used in Super GT, Formula Nippon, F3, F3000, Super Taikyu, IMSA, Pirelli World Challenge, Rally America, VLN, Le Mans Series, Formula Drift, and many other professional racing avenues.
