Universal Sponge O-RING (4 pcs) d. 16,5 mm x L. 3,5 mm for Air-System Wheels (must be trued)

Ring dimensions: Width: 3.5 mm Outer diameter: 16.5 mm Inner diameter: 9.5 mm The new universal sponge rings fit any Air System wheel. However, for proper use, they must be trued to fit the specific wheel being used. Once installed, the expected improvement on the track is approximately 0.2 seconds per lap*, enhancing both cornering and the car’s rolling efficiency. *Standard conditions tested on the NSR test circuit.