The Super-9's refined shape runs wide and parallel from the hub until it feathers inward as it meets the hookless tire bed.Thanks to Zipps Total System Efficiency (TSE) carbon laminate and design, the Super-9 is engineered for a new era of wider tires and lower tire pressure in TT and triathlon. Zipp bases its TSE approach to wheel design on a simple premise: Efficiency equals speed, perfect pavement or not.Combining Zipps wheel laminate with a wider rim profile and optimized tire interface helps you overcome the four barriers to speed: wind resistance, gravity, rolling resistance, and vibration losses. Guided by TSE, Zipp remade the Super-9 from the rim-tire interface to its ceramic bearings. The result is less wasted effort for you. For triathletes, that means youll have more energy for the run.The Super-9 pairs perfectly with Zipps current tubeless front wheels. Theold ideais that it is always faster to pump up your tires rock hard before a time trial or triathlon. You felt