Standard on TRX-4MT^™, large Terra Groove 3.14×1.65″ tires give your monster truck a towering stance with the authentic “hand carved” looks of real monster truck tires. Terra Groove tires provide excellent traction with an aggressive tread pattern that bites into loose surfaces. The sticky rubber compound is also great on carpet, grass, and pavement. Tires come mounted to 1.2″ chrome deep dish monster truck wheels. For extra control, try 9879 soft foam inserts.