Thanks to its' well defined center bead and arced tread profile, MBS' original custom tread, the T1, is still the fastest 8" tread on the market, but it's the fact the T1 is still the lightest tire on the market that makes it a top choice around the world. Hub Opening: 3.8" diameter (97mm) Tire Diameter: 7.625” (194mm) Tire Width: 2” (51mm) Weight: 8.2oz (232 grams) per ****8" Tubes sold separately.****