700c, 27-Inch & 650c

Everything that the standard X1 offers, but with added protection for those particularly tough rides where there may be a greater risk of punctures. - Ideal for gravel, dirt, and rough pavement - TuffTex+ increases tire resilience with a dual layer of bead-to-bead TuffTex material, providing additional puncture resistance and heightened security in the most challenging conditions - BeadLock is engineered to accommodate a broader range of rims, including both hookless and clincher types. In most instances, mounting the tire can be effortlessly achieved with a standard floor pump - ZSG GRAVEL Compound is crafted from a proprietary ZSG (Zero Slip Grip) material to ensure remarkable resistance to temperature and weather fluctuations. This consistent rubber performance across a spectrum of temperatures provides lower rolling resistance and improved grip - Folding (Aramid) Bead - Tubeless and Hookless Compatible - Tubeless Ready up to 60 PSI

Looking for a tire that's more tread aggressive and wider than the mixte-tread narrower Gravel King? The GravelKing SK might just be the tire you need for the more hardcore roads. Aggressive knobs, ZSG Natural rubber compound, puncture protection breaker and AX-A special low rolling resistance casing make the Gravel King a go-anywhere tire. - Black multi-use gravel tread - Aramid (Kevlar) folding bead