8.4Staff pick
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Trail · NNormal
Kboix
NNormal's modular shoe: swap the midsole to change the ride on long days over rough ground.
7.8 Solid
Runsletter Score out of 10. Good at its job, with clear limits.
Buy it if
- Soft, cushioned ride for long days
- Swappable midsoles change the feel
- Replaceable parts extend its life
Skip it if
- Expensive
- Heavier than race shoes
$240
List price; often discounted in seasonal sales
Check price at retailers ↗When does it go on sale?We may earn a commission
- Weight
- 290 g
- Stack
- 33 mm
- Drop
- 6 mm
The verdict
The Kboix is NNormal's cushioned trail shoe, and its midsole is removable. Each pair comes with two of three supercritical foam midsoles: Kb1 Soft (EVA), Kb2 Reactive (TPU) and Kb3 Bounce (PEBA). You can swap them to change the ride, and the upper, midsole and outsole can each be replaced when worn.
It suits runners who want cushioning and comfort for long days and ultras. It's softer than the Tomir 2.0 and more stable than the Zegama 2. It's heavier and less precise than the Kjerag.
The fit is secure and comfortable. It fits true to size.
“Built for long days. It's soft enough for the last ten miles without feeling vague underfoot.”
Specs
| Weight | 290 g |
|---|---|
| Stack height | 33 mm |
| Drop | 6 mm |
| Cushion | 4 / 5 |
| Plate | None |
| Support | Neutral |
| Surface | trail |
| Best for | long, recovery |
| Midsole | Two interchangeable supercritical midsoles (from Kb1 EVA, Kb2 TPU, Kb3 PEBA) |
| Upper | Matryx Jacquard |
| Outsole | Vibram Megagrip |
| Lugs | 3.5mm |
| Rock plate | None listed |
| Fit | True to size, secure |
We may earn a commission if you buy through our links. Scores are sample editorial data.
How it stacks up
Compare side by side →| Product | Score | Price |
|---|---|---|
| NNormal Kboix · this one | 7.8 Solid | $240 |
| Hoka Speedgoat 6 | 8.4 Strong | $155 |
| NNormal Kjerag | 8.2 Strong | $195 |
| Salomon S/Lab Genesis | 8.1 Strong | $200 |
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