Top of the range inner tube handmade bonded rugged Gravel/CX tire for professional use Bonded tread based on natural rubber Smart Plus = low rolling resistance and excellent grip Super PolyCorazza Armor sidewall material provides excellent performance, comfort and durability in the field Use only with grooved rims - Hooked PPS Ganzo + 2 x PPS puncture protection 260 TPI 2.3 - 3.8 BAR 355 g