The extra rubber on the Pegasus 39 outsole makes it more durable than the outsole of the Miler 2.(Image credit: Future) Nike Air Zoom Pegasus 38: the tech There is only a small section under the centre of the heel not covered by rubber. The Pegasus 39 uses harder, carbon rubber on its lateral rails and blown rubber on the main section. The outsole of the Miler 2 has 5 separate areas covered by soft, blown rubber and a large section under the heel and midfoot with exposed midsole foam. In the Miler 2, there is no Zoom Bag, so the single density midsole results in smooth ride transitions. When loading the forefoot of the Pegasus 39, the 10mm thick Zoom Air Bag can be felt underfoot so it prevents ride transitions from being smooth. The Pegasus 39 has a firm midsole with no lean bias which also makes it very stable but less stable than the Miler 2 because in the Miler 2 your foot sinks down and is cupped by the midsole. The Miler 2’s midsole flares out at the bottom which creates a large, stable base. You might notice the Zoom Air bag in the Pegasus more over time when the foam eventually flattens. You can expect to get very high mileage out of both shoes as they both have React midsoles which don’t lose much cushioning over the life of the shoe. The Miler 2’s max-cushioned midsole offers plenty of protection without getting mushy.

The soft ride of the Miler 2 is best suited to long, slow runs. The thick Zoom Air bag provides a springy toe-off needed when going fast. The medium-firm ride of the Pegasus 39 makes it more suited to shorter, tempo runs than the Miler 2. Like the Infinity Run, the Miler 2 uses a lower density React foam which is much softer than the React used in the Pegasus 39.

Both shoes have full React midsoles but the main difference is that the Pegasus 39 has an extra top-loaded Zoom Air unit in its forefoot for added responsiveness and one in its heel for extra cushioning.

Nike air zoom pegasus 37 vs shield