This is a set of two Dynamite Speed Treads Breakaway SC Pre-Mounted Tires, and are intended for use on the rear of the Traxxas Slash, as well as the front and rear of the OFNA/Jammin 4WD SC's, HPI Blitz, Traxxas Slash 4x4, and Kyosho Ultima SC and DB. These tires are recommended for hard packed, blue groove tracks, as well as loose wet dirt, pavement and grass.