KIZER Fluid IV Superfluid - The ideal frame for anti-rocker aggressive skating. Fluid material slides perfectly on all materials, max. 60mm wheels on outside, UFS mountingSpecial Nylon plus carbon-fiberUFS mountingS=246mm, M=258mm, L=266mm60mm outer max wheel size48mm inner max wheel size - antirockerWeight: S = 220g, M = 230g, L = 240gThe KIZER Fluid IV Superfluid may be the best anti-rocker frame on the aggressive skating market. Designed to be the ultimate aggressive frame for grinds of all kinds, the frame is lightweight, super-strong, and slides on all types of surfaces - from rails to coping to marble, to rough concrete ledges, the all-new Superfluid material can withstand lots of abuse while sliding perfectly on all materials and obstacles. To improve control, the KIZER Fluid IV Superfluid has a unique groove shape that leads directly towards the anti-rocker wheel, resulting in perfect lock-on and fast, smooth slides. This lightweight frame accepts up to 60mm wheels on the outside of the frame and standard anti-rocker wheels on the inside positions providing maximum rolling speed and the lowest possible height to improve balance and stability. To match your foot size, the KIZER Fluid IV comes in three different lengths. The frame includes double steel axles & aluminum frame spacers to ensure your wheels spin faster and last longer. The Fluid family of frames has been a favorite anti-rocker frame of aggressive skaters for years and the KIZER Fluid IV improves on what is already a superb collection of frames. Try it for yourself. Kizer works well with all skates but these are the suggest sizes for USDs!S= Carbon & Carbon Free, Realm to 41, Sway, Thrones, VII, Shadow to 40;M= Carbon & Carbon Free, Realm 42/43, Sway, Thrones, VII, Shadow over 41/42,L= Carbon & Carbon Free, Realm over 44, Sway, Thrones, VII, Shadow over 43