... of CAD, CAPP, and three finite element analysis, etc. Size bolt hole Center hole PCD ET1. 17.5X6.75 10/26 ... 6898666Tub wheel: 8.5-20, 8.0-20, 7.5-20, 6.0-16, 5.5-16, 8.5-24.and so on. Tubeless wheel: 24.5x8.25 ... ,22.5x7.5,22.5x8.25, 22.5x9.00, ... 19.5x7.5,19.5x6.75,17.5x6.75,17.5x6.00,5.5x16,22.5x8.25(Demountable rims) and so on. Steel Wheel rim