For decades, an obsession with aerodynamics has influenced everything from wheels to water bottles. But with the Zipp Sub-9 disc Tubular Wheel, Zipp has moved from minimizing drag to maximizing propulsion.

The Sub-9's highlights so far include Ironman 70.3 World Championships for Andy Potts and Terenzo Bozzone, and a yellow jersey for Fabian Cancellara. We expected nothing less from the ultimate aerodynamic breakthrough.

In the center of the aero "sweet spot" – a wind angle of 12 to 18 degrees – the Zipp Sub-9 was the first wheel ever to produce forward lift, when paired with our 21mm Tangente tire. To achieve this feat, we added a toroidal bulge similar to our 1080 and 808 spoked wheels around the edge of the disc to control airflow at the wheel’s leading and trailing edges. In addition to improving aero performance, the bulge’s vertical compliance keeps the Sub-9 glued to the road when cornering and yields a comfortable ride. This makes it the ideal choice for long-course triathletes to bounce out of T2 with fresh legs after a blistering bike split.

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Features & Specs:

Total Weight: 998g, with Powertap: 1152g

Aero Width: 28.46mm

Tire Bed Width: 18.0mm

Track Adaptable: No

Dimpled Surface: Yes

MSRP: $2075