Head-to-Head
Adizero Adios 9vsGlycerin Flex
The Adizero Adios 9 is a speed trainer shoe while the Glycerin Flex is a daily trainer shoe. The Adizero Adios 9 retails for $140 while the Glycerin Flex comes in at $170 — a $30 difference. The Adizero Adios 9 is the lighter shoe at 6.2 oz versus 9.1 oz for the Glycerin Flex. In our ratings, the Adizero Adios 9 edges out the Glycerin Flex — 9.4/10 versus 8.0/10.
| Rating | 9.4 / 10✓ | 8.0 / 10 | |
| Price | $140✓ | $170 | |
| Weight | 6.2 oz✓ | 9.1 oz | |
| Category | Speed Trainer | Daily Trainer | |
| Terrain | Road | Road | |
| Cushion | Low | Medium | |
| Softness | Soft | Balanced | |
| Drop | Medium | Medium | |
| Drop (mm) | 7 mm | 6 mm | |
| Stack | 28 mm | 36 mm | |
| Stability | Neutral | Neutral | |
| Fit | Narrow | Narrow | |
| Energy Return | High✓ | Low | |
| Breathability | Warm | Medium✓ | |
| Traction | Medium | High✓ | |
| Shock Absorption | Medium | High✓ | |
| Durability | Good | Good |
