MRP Ribbon Air Suspension Fork - 27.5" 160 mm 15 x 110 mm 39 mm Offset BlackMRP Ribbon Air Suspension Fork 27. 5" 160 mm 15 x 110 mm 39 mm Offset Black. The Ribbon Air is an enduro capable trail fork with unprecedented adjustment features. Beefy stanchions extra plush small bump compliance and a distinctive arch combine to make a fork that excels under a variety of trail conditions. Robust Outcast arch provides lateral stiffness and doesnt fill with mud PSST pressure relief valve aids in equalization at high altitude and