Altra Superior 7 vs Icebug Järv RB9X
Two current shoes in the same category with similar stack height and drop, compared on the values in the database. Each cell carries a provenance badge; open a shoe for sources.
- Altra Superior 722/22 mm · toe rocker 34 % · heel bevel 6 %
- Icebug Järv RB9X29/25 mm · toe rocker not measured
| Metric | Altra Superior 7 Trail · Trail | Icebug Järv RB9X Trail · Trail |
|---|---|---|
| Heel-to-toe drop | 0 mmStated | 4 mmDerived |
| Heel stack | 22 mmStated | 29 mmStated |
| Forefoot stack | 22 mmStated | 25 mmStated |
| Weight | 238 gStated | 340 gStated |
| Toe rocker | 34 %est. | — |
| Rocker radius | 61 %est. | — |
| Rocker rise angle | 22 degest. | — |
| Rocker angle at toe | 50 degest. | — |
| Toe tip over ground | 27 mm*est. | — |
| Visible rocker lift onset | 81.4 %est. | — |
| Toe spring (relative) | 13.5 %est. | — |
| Heel bevel length | 6 %*est. | — |
| Midsole width (forefoot) | 113.5 mmMeasured | 116 mmMeasured |
| Midsole width (heel) | 84 mmMeasured | 93.9 mmMeasured |
| Toe box shape | 78 %est. | — |
| Interior forefoot width | 96.6 mmMeasured | 93.3 mmMeasured |
| Toebox width | 78.1 mmMeasured | 74.2 mmMeasured |
| Longitudinal stiffness | 3Derived | 62Derived |
| Midsole firmness | 83Derived | — |
| Plate | No plate | No plate |
| Primary foam | compression-moulded EVA | eTPU (66% Susterra bio-based) |
| List price | $140 | $179 |
Key differences
- Altra Superior 7's heel-to-toe drop is 0 mm, 4 mm lower than Icebug Järv RB9X's 4 mm.
- Altra Superior 7's heel stack is 22 mm, 7 mm thinner than Icebug Järv RB9X's 29 mm.
- Altra Superior 7's forefoot stack is 22 mm, 3 mm thinner than Icebug Järv RB9X's 25 mm.
- Altra Superior 7's weight is 238 g, 102 g lighter than Icebug Järv RB9X's 340 g.
Altra Superior 7 details · Icebug Järv RB9X details · Add more shoes