Aggressive widely spaced tread for high degree of traction ''Showdown CR'' and ''Duratrax C3'' in white lettering on sidewall Duratrax C3 compound compares to the Pro-Line M4 super soft, and the AKA Super Soft compound 1.9'' Showdown CR Tire (2) C3 Duratrax Dimensions: diaouter: 121 mm diainner: 1.9'' Width: 48 mm