Step 02 — The lineup
6 shoes scored across eleven metrics · Any purpose
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Topo Athletic ST-6 — Zero-drop, low-stack speed shoe for strides, track and gym work.
Sizing note
Rivera 4 run snug — go up half a size, especially for long runs.
Durability
Expect roughly 375 miles before the midsole flattens out.
Step 03 — Every metric
| Metric | Altra Instinct(2011) | Altra Torin 9(2025) | Altra Escalante 5(2025) | Topo Athletic Magnifly 6 | Altra Rivera 4 | Altra Paradigm 8 | Topo Athletic Fli-Lyte 6 |
|---|---|---|---|---|---|---|---|
| Weight | 280 g / 9.9 oz | 270 g / 9.5 oz | 275 g / 9.7 oz | 255 g / 9.0 oz | 283 g / 10.0 oz | 278 g / 9.8 oz | 210 g / 7.4 oz |
| Drop | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 3 mm |
| Stack (heel) | 23 mm | 32 mm | 24 mm | 26 mm | 28 mm | 30 mm | 23 mm |
| Cushioning | |||||||
| Flexibility | |||||||
| Stability (5 = most guidance) | |||||||
| Rocker geometry | |||||||
| Energy return | |||||||
| Responsiveness | |||||||
| Toe-box | Very wide | Very wide | Very wide | Very wide | Very wide | Very wide | Very wide |
| Plate | — | — | — | — | — | — | — |
| Intended pace | 8:30–11:30 /mi | 8:30–11:30 /mi | 7:30–10:30 /mi | 8:30–11:00 /mi | 7:30–10:00 /mi | 7:30–10:00 /mi | 7:00–9:30 /mi |
| Purpose | Daily | Daily, Long run | Daily, Tempo | Daily | Daily, Long run | Daily, Long run | Tempo, Daily |
| Sizing | True to size | True to size | True to size | True to size | Size up ½ | True to size | True to size |
| Durability | ~400 mi | ~450 mi | ~350 mi | ~350 mi | ~400 mi | ~400 mi | ~300 mi |
| Price | $110 | $160 | $140 | $140 | $120 | $180 | $110 |
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.