These Schumacher Rush M Mini Medium Vr2 tire inserts are a factory replacement foam insert designed for M-chassis on-road RC cars. The medium compound offers a balance between support and compliance suited to a range of track surfaces. Sold as a set of 4 black inserts, supplying enough for a full four-wheel fitment. Features: Set of 4 inserts, enough for all four wheels Medium compound foam construction Vr2 generation design Sized for M Mini class tires Black colorway 7/7/26 cs