
By pressing the side walls of both shoes I can tell the Zoom Fly's carbon plate towards the rear of the shoe is narrower as I can't feel it.

Vaporfly uses lighter more silky softer feeling Zoom X PEBA foam while Zoom Fly uses the denser somewhat less lively React.

While both the Vaporfly and Zoom Fly have similar midsole stack heights and geometry there are differences, Differences in midsole design between the Vaporfly and ZoomFly:
#Flyknit nike zoom shoes with ankle sock full#
The midsole combines Nike's React foam with a full carbon propulsion plate. Sock weight selection is probably a far better size tuning tool than sizing up or down in most cases. My last run I wore somewhat heavier Stance Fusion merino socks and fit was totally secure, removing some extra rear of the shoe volume with plenty of room upfront. Update: after a few runs the upper has stretched somewhat and the tapered toe is no longer noticed. Here the fit is very close to perfection from heel to toe for me fi a bit more tapered way up front than I prefer, the front rounding of the original and Vaporfly were just about right. I found the Pegasus Turbo somewhat roomy and unstructured at 8.5 as there was no stretch and at the same time low over the toes. I am 8.5 in the Vaporfly but have to wear heavier socks, 8.5 in the Epic React but find them very snug at the lower mid foot and somewhat overly high and rigid in hold at the achilles and heel, was just fine in the original Zoom Fly at 8.5 but found them a bit awkward fitting as the FlyWire didn't really match the dense not very stretchy upper. The fit is more performance oriented and while far more pliable, stretchy and light on the foot reminds me most of the Pegasus 35 in the Nike line up. The Zoom Fly fits me true to my usual size 8.5. The dynamism of this uptempo trainer racer far surpasses the Epic React (RTR review), a shoe I found somewhat better cushioned, particularly in forefoot but dull in its ride and performance. While the weight for this 10m drop shoe creeps up about 0.2 oz to approximately 8.6 oz /244g (my sample US M 8.5 weighs 8.325 oz/236g) the ride is almost completely changed and approaches that of the VaporFly in its dynamic spring yet well cushioned feel. and the engineered mesh upper for a Flyknit upper with no overlays and no heel counter.the original's Lunarlon midsole for Nike new React but not the Zoom X of the VaporFly, a.the mostly plastic propulsion plate of the original for a full carbon plate similar but not as wide as the VaporFly's,.The original Zoom Fly ( RTR review) "appeared" similar to Nike's ground breaking Vaporfly 4% ( RTR review) but ran quite roughly and firmly, with less pace range and weighed considerably more than the Vaporfly. The "new" Zoom Fly is a racer trainer suitable for uptempo training and longer racers. The Zoom Fly Flyknit, the second in the series, available now, arrives with big changes.
