Side by side comparison: Altra Mont Blanc Carbon vs Nike ACG Ultrafly Trail
Product Judgment
Solid
released 2024
Price Judgment
Unjustified
Widely Available
Performance
Run Fitness
Pros & Cons
Flexible carbon plate
Roomy anatomical toe box
Lightweight for category
Limited energy return
Heel retention still imperfect
Firm ride in cold
Specs
| Best for | 5:30-7:30 min/km |
| Drop | 0 mm |
| Stack | 27.2 mm heel / 26.9 mm forefoot |
| Weight | 251 g |
| Terrain | light_trail |
| Width | medium |
| Pronation | neutral |
| Season | all seasons |
| Plate | Carbon |
Judgment Summary
Lightweight, flexible carbon-plated trail racer best for dry ultras and efficient strikers.
Where to Buy
Product Judgment
Strong
released 2026
Price Judgment
Unjustified
Widely Available
Performance
Run Fitness
Pros & Cons
Outstanding energy return
Stable wide platform
Comfortable for long runs
Limited breathability
Stiff on technical trails
Heel lockdown could be better
Specs
| Best for | 5:30–7:30 min/km |
| Drop | 8.5 mm |
| Stack | 38 mm heel / 29.5 mm forefoot |
| Weight | 269 g |
| Terrain | light_trail |
| Width | Medium |
| Pronation | Neutral |
| Season | All seasons |
| Plate | Carbon |
Judgment Summary
Premium trail racer excelling on mild to moderate terrain with top-tier energy return.
Where to Buy