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Propulsion is possible.

Typically, we think of aerodynamics as the science of reducing drag. You want as little resistance as possible from your equipment while you're producing as much power as you can on the bike. Zipp's Sub-9 disc throws that notion out the window by generating 80g of forward lift at certain wind angles when paired with our Tangente tire. Like a sailboat tacking into the wind, your equipment can actually propel you forward.

Zipp has achieved the seemingly impossible by applying what they've learned from developing the 1080 and 808 to what they already knew about discs. Ringed by the patented toroidal rim profile, the Sub 9's shape is an odd one but it works by controlling airflow at the wheel's leading and trailing edges. And just like Zipp's non-disc wheels, the Sub 9 absorbs impacts and vibrations from the road surface, making for a comfortable ride over a long bike leg.

Companies sometimes talk about their products giving you an "extra boost" in a metaphorical sense. But Zipp's Sub 9 physically gives you that boost. We think that's pretty amazing, and Garmin-Chipotle's Tour de France stars, David Millar and Christian Vande Velde, would agree.