Maxxis Ikon XC MTB TyreThe Ikon is for true racers looking for a true lightweight race tire. With high-volume casing and a fast rolling tread design, the Ikon provides exemplary performance in all riding conditions. As its name suggests, the Ikon represents all that is true in racing.EXC - The number of threads that cross through one square inch of a single ply of the tire’s casing. Lower TPI gives better puncture, cut and abrasion resistance but is heavier. Higher TPI conforms better to the terrain.Features: Size: 29 x 2.20 ETRTO: 57-662 TPI: 60Bead: Folding Compound: DualMax PSI: 65 Weight: 590gBuy Maxxis Tyres from Chain Reaction Cycles, the World’s Largest Online Bike Store.