Head-to-Head
Alphafly 3vsGlycerin Flex
The Alphafly 3 is a race shoe while the Glycerin Flex is a daily trainer shoe. The Alphafly 3 retails for $285 while the Glycerin Flex comes in at $170 — a $115 difference. The Alphafly 3 is the lighter shoe at 7.0 oz versus 9.1 oz for the Glycerin Flex. In our ratings, the Alphafly 3 edges out the Glycerin Flex — 8.9/10 versus 8.0/10.
| Rating | 8.9 / 10✓ | 8.0 / 10 | |
| Price | $285 | $170✓ | |
| Weight | 7.0 oz✓ | 9.1 oz | |
| Category | Race Shoe | Daily Trainer | |
| Terrain | Road | Road | |
| Cushion | Medium | Medium | |
| Softness | Soft | Balanced | |
| Drop | Medium | Medium | |
| Drop (mm) | 8 mm | 6 mm | |
| Stack | 40 mm | 36 mm | |
| Stability | Neutral | Neutral | |
| Fit | Medium | Narrow | |
| Energy Return | High✓ | Low | |
| Breathability | Breathable✓ | Medium | |
| Traction | Low | High✓ | |
| Shock Absorption | Medium | High✓ | |
| Durability | Bad | Good✓ |
