RockShox Maxima 15W-50 Rear Shock Air Can Oil fluid is used for Rock Shox shock's air cans and fork's air spring side . It is an advanced lubricant fluid for high performance MTB suspension systems. This fluid is designed for use in both forks and shocks. Surface active technology eliminates stiction, reduces friction and considerably lowers the force needed for easy breakaway in the initial stroke of travel, providing smooth action throughout the entire range of travel. Advanced additives extend seal life and protect the system from wear and corrosion. Enjoy a plush ride from start to finish with incredible all-terrain feel and responsive component feedback. This fluid was developed with the world’s fastest racers, on the world’s toughest circuits. Proven in XC, Enduro, All Mountain, DH and Freeride. It is optimized for today’s sophisticated suspension systems.