Altra Lone Peak 9 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 Lone Peak 925/25 mm · toe rocker 27 % · heel bevel 4 %
- Icebug Järv RB9X29/25 mm · toe rocker not measured
| Metric | Altra Lone Peak 9 Trail · Trail | Icebug Järv RB9X Trail · Trail |
|---|---|---|
| Heel-to-toe drop | 0 mmStated | 4 mmDerived |
| Heel stack | 25 mmStated | 29 mmStated |
| Forefoot stack | 25 mmDerived | 25 mmStated |
| Weight | 316 gStated | 340 gStated |
| Toe rocker | 27 %est. | — |
| Rocker radius | 41 %est. | — |
| Rocker rise angle | 28 degest. | — |
| Rocker angle at toe | 60 degest. | — |
| Toe tip over ground | 26 mm*est. | — |
| Visible rocker lift onset | 85 %est. | — |
| Toe spring (relative) | 14.4 %est. | — |
| Heel bevel length | 3.7 %*est. | — |
| Heel bevel height | 8 mm*est. | — |
| Midsole width (forefoot) | 112.2 mmMeasured | 116 mmMeasured |
| Midsole width (heel) | 82.1 mmMeasured | 93.9 mmMeasured |
| Toe box shape | 84 %*est. | — |
| Interior forefoot width | 98.5 mmMeasured | 93.3 mmMeasured |
| Toebox width | 85.3 mmMeasured | 74.2 mmMeasured |
| Longitudinal stiffness | 21Derived | 62Derived |
| Midsole firmness | 79Derived | — |
| Plate | Rock plate | No plate |
| Primary foam | Altra EGO | eTPU (66% Susterra bio-based) |
| List price | $145 | $179 |
Key differences
- Altra Lone Peak 9's heel-to-toe drop is 0 mm, 4 mm lower than Icebug Järv RB9X's 4 mm.
- Altra Lone Peak 9's heel stack is 25 mm, 4 mm thinner than Icebug Järv RB9X's 29 mm.
- Forefoot stack is about the same: 25 mm for Altra Lone Peak 9, 25 mm for Icebug Järv RB9X.
- Altra Lone Peak 9's weight is 316 g, 24 g lighter than Icebug Järv RB9X's 340 g.
Altra Lone Peak 9 details · Icebug Järv RB9X details · Add more shoes