Progressive Front Fork Springs Honda / Kawasaki / Suzuki / Yamaha / BMW / Ducati A must-have upgrade to your stock suspension, this Progressive fork spring kit will improve your ride quality while increasing your handling performance. Features: Progressive springs offer a soft initial spring rate for a plush ride with increased resistance to bottoming as the spring compresses Improves your handling while retaining the OEM geometry Simple upgrade to drastically improve long rides and reduce fatigue Sold in pairs Made in the USA