Step 02 — The lineup
6 shoes scored across eleven metrics · Any purpose
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Adidas Adizero Prime X3 STRUNG — Adidas Adizero Prime X3 STRUNG: 50 mm heel stack, 7 mm drop, 291 g — specs from independent lab testing.
Sizing note
Everything here fits true to size. Leave a thumbnail of space at the toe.
Durability
Plated models here average ~285 mi; non-plated land closer to ~400 mi.
Step 03 — Every metric
| Metric | Puma Fast R NITRO Elite 2 | Puma Fast-R Nitro Elite 3(2025) | Nike Zoom Fly 6(2024) | On Cloudsoma(2025) | Under Armour Velociti Pro 2 | On Cloudmonster Hyper | Saucony Triumph 23(2025) |
|---|---|---|---|---|---|---|---|
| Weight | 255 g / 9.0 oz | 170 g / 6.0 oz | 244 g / 8.6 oz | 270 g / 9.5 oz | 252 g / 8.9 oz | 255 g / 9.0 oz | 263 g / 9.3 oz |
| Drop | 8 mm | 8 mm | 8 mm | 8 mm | 8 mm | 6 mm | 10 mm |
| Stack (heel) | 37 mm | 40 mm | 40 mm | 37 mm | 37 mm | 37 mm | 37 mm |
| Cushioning | |||||||
| Flexibility | |||||||
| Stability (5 = most guidance) | |||||||
| Rocker geometry | |||||||
| Energy return | |||||||
| Responsiveness | |||||||
| Toe-box | Standard | Standard | Standard | Standard | Standard | Standard | Standard |
| Plate | Carbon | Carbon | Carbon | — | Nylon | — | — |
| Intended pace | 4:50–7:00 /mi | 4:50–7:00 /mi | 6:15–8:30 /mi | 8:30–11:30 /mi | 6:00–8:15 /mi | 7:30–10:30 /mi | 8:30–11:30 /mi |
| Purpose | Race day | Race day | Tempo, Long run | Daily, Recovery, Long run | Tempo, Race day | Daily, Long run, Tempo | Recovery, Long run, Daily |
| Sizing | True to size | True to size | True to size | True to size | True to size | True to size | True to size |
| Durability | ~220 mi | ~220 mi | ~350 mi | ~400 mi | ~350 mi | ~400 mi | ~450 mi |
| Price | $255 | $275 | $190 | $180 | $160 | $200 | $165 |
Your reference shoe is shown first for context. Cushioning, flexibility and stability are rated 1–5, where 5 stability means the most guidance and 1 means fully neutral.