 Firecrest essentially inverts this shape, placing the leading edge of the airfoil along the interior of the rim (towards the hub).As a result, Zipp claims that Firecrest rims show improved aerodynamic performance at all points around the wheel, combined with improved stability in crosswinds.A product review on the Cyclingnews website reported, “[the] Firecrest aero profile is noticeably fast at cruising speed” and that a Firecrest wheelset “[offers] handling stability in crosswinds unmatched by other aero wheels we've used.”

Zipp NSW wheels feature the company's most advanced technologies and is short for "Nest Speed Weaponry" a reference to the company's advanced R&D office known as "The Nest".