All Blockley bias-ply tires are designed to fit stock rim widths. Plus, they're true road tires, with a tough sidewall and coating. The Dunlop triple lug pattern at the time was problematic, leading to its replacement. so we have redesigned all the features of this model to make it work properly without wearing out in no time. The composition of all Blockley cross-ply (Bias, or Diagonal) tires conforms to the FIA Appendix K which uses Dunlop 204 compound as the benchmark hardness. This same Blockley tire, surprisingly, has no equal, having won several thousand races and other competitions as well as numerous Concours d'Elegance where its perfect look is appreciated!