Smoother is faster with the Zipp Super-9 Tubeless Disc-Brake Disc. Among the lightest disc wheels available the Super-9 is a superior addition to your modern triathlon and time trial bike. Its refined shape runs wide and parallel from the hub until it feathers inward as it meets the hookless tire bed. Thanks to Zipp’s 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.