Traxxas tires, maxx 3. 8" (6. 3" outer diameter (160mm)) (2) (fits revo/t-maxx/e-maxx) 38-4973 description: 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. Replacement part for these models: revo t-maxx accessory part for these models: e-revo vxl brushless sledge summit t-maxx