Head-to-Head
Glycerin 23vsGlycerin Flex
The Glycerin 23 and Glycerin Flex are both daily trainer shoes built for road running. The Glycerin 23 retails for $175 while the Glycerin Flex comes in at $170 — a $5 difference. The Glycerin Flex is the lighter shoe at 9.1 oz versus 10.6 oz for the Glycerin 23. Both score 8.0/10 in our ratings.
| Rating | 8.0 / 10✓ | 8.0 / 10✓ | |
| Price | $175 | $170✓ | |
| Weight | 10.6 oz | 9.1 oz✓ | |
| Category | Daily Trainer | Daily Trainer | |
| Terrain | Road | Road | |
| Cushion | Medium | Medium | |
| Softness | Balanced | Balanced | |
| Drop | Medium | Medium | |
| Drop (mm) | 8 mm | 6 mm | |
| Stack | 38 mm | 36 mm | |
| Stability | Neutral | Neutral | |
| Fit | Wide | Narrow | |
| Energy Return | Low✓ | Low✓ | |
| Breathability | Medium | Medium | |
| Traction | Medium | High✓ | |
| Shock Absorption | High | High | |
| Durability | Very Good✓ | Good |
