The zipp super-9 tubeless disc-brake wheel is one of the lightest disc wheels on the market and is specially designed for time trials and triathlons. Its aerodynamic shape combined with the hookless tubeless rim bed ensures high efficiency and control. Thanks to the zipp total system efficiency (tse) design the super-9 is optimally tuned for wider tires and lower air pressures for maximum speed even on less than perfect surfaces. - 23 mm inner rim width (30.4 mm outer width) for optimizing wider tires that are ridden at lower pressures. - 28 mm minimum and optimal tire size. - integrated tyrewiz 2.0 tire pressure monitor (10 g). - aerodynamic durable lightweight. - water savings due to reduced rolling resistance. - newly designed pump access with integrated cover – no sticker required. - optimized for tubeless setup but you can also use a tube with tubeless tires. - low rolling resistance ceramic bearings for race day performance. - xdr or sram/shimano freehub body. - campagnolo freehub body sold separately. - lifetime warranty (see manufacturers warranty) zipp axs wheel sensor covered by srams standard 2-year warranty. - max. Air pressure: 73 psi/5.0 bar - super-9 weight according to manufacturer: 1050 g - maximum system weight: 115 kg / 253 lbs scope of delivery: 1x zipp super-9 wheel 1x integrated tyrewiz 2.0 tire pressure sensor 1x tubeless valve 1x center lock ring 1x valve cover 1x angle adapter for air pump 1x zipp wheel bag and disc protector for travel zipp hookless tire compatiblity guide (https://www.sram.com/en/zipp/campaigns/hookless-tire-compatibility) zipp tire pressure guide (https://axs.sram.com/guides/tire/pressure)