F-1 Series Vapor Grips are made from our exclusive A.I.R.E compound which infuses air into the grip reducing weight by over 30 % and providing a slower rebound and response for improved comfort. ● Diameter: 31.5 mm ● Reinforced inner layer for added durability ● Added Surface Pattern provides improved grip in all conditions ● Ergonomic finger cutouts for a better gripping surface and improved control