The huge 6.3″ diameter Maxx^® tire and foam combo delivers excellent off-road grip and increased ground clearance to overcome deep ruts and huge obstacles. The unique soft compound delivers exceptional performance on a variety of surfaces. The aggressive treads dig deep providing superior bite and massive roosts. On pavement the balanced grip allows just the right amount of scrub to maintain a sure-footed neutral feel. They come complete with high performance foam inserts and are designed to fit Traxxas 3.8″ wheels.