Adidas Adizero Evo SL vs Nike Structure 26:
Which to Choose

Start with weight and drop, because that's where the personalities split. The Evo SL comes in around 223g with a 6mm drop on a roughly 39mm heel / 33mm forefoot stack, so it's light, low-slung at the front, and built to roll forward toward a midfoot strike. The Structure 26 weighs about 298g on a 36mm heel / 26mm forefoot platform with a 10mm drop — noticeably heavier, and that taller heel-to-toe offset deliberately favors heel strikers and eases the calves on long, steady miles. Underfoot the foams are a study in contrast: the Evo SL's full-length Lightstrike Pro is soft-yet-springy and drives real rebound when you push the pace, whereas the Structure 26's ReactX is firm and controlled, prioritizing a secure, predictable landing over pop. Neither shoe uses a plate, so both rely on foam alone — but the Evo SL's foam is tuned for energy return (responsiveness 5/6) while the Structure's is tuned for stability (responsiveness 4/6). Stability is the other decisive axis: the Structure 26 is a genuine stability shoe (5/6) with dual guide rails that quietly correct wobble without a rigid medial post, while the Evo SL is neutral (3/6) and, by its own nature, can feel a touch unsettled on its soft, tall platform at slow jog paces. That shows up in intended pace and distance, too — the Evo SL is optimal roughly in the 3:45–4:30 min/km range and shines at 5K/10K/half, whereas the Structure 26 is happiest around 5:00–6:00 min/km and covers 10K through the marathon as a training and steady-effort companion. Push the Structure hard and its weight and firm foam start to feel like anchors; run the Evo SL slowly and its liveliness goes quiet. They excel at different jobs, not the same job to different degrees.