Head-to-Head
Glycerin 23vsAero Glide 4
The Glycerin 23 and Aero Glide 4 are both daily trainer shoes built for road running. The Glycerin 23 retails for $175 while the Aero Glide 4 comes in at $160 — a $15 difference. The Aero Glide 4 is the lighter shoe at 9.0 oz versus 10.6 oz for the Glycerin 23. In our ratings, the Aero Glide 4 edges out the Glycerin 23 — 9.0/10 versus 8.0/10.
| Rating | 8.0 / 10 | 9.0 / 10✓ | |
| Price | $175 | $160✓ | |
| Weight | 10.6 oz | 9.0 oz✓ | |
| Category | Daily Trainer | Daily Trainer | |
| Terrain | Road | Road | |
| Cushion | Medium | High | |
| Softness | Balanced | Balanced | |
| Drop | Medium | Medium | |
| Drop (mm) | 8 mm | 8 mm | |
| Stack | 38 mm | 42 mm | |
| Stability | Neutral | Neutral | |
| Fit | Wide | Medium | |
| Energy Return | Low | High✓ | |
| Breathability | Medium | Medium | |
| Traction | Medium | High✓ | |
| Shock Absorption | High | High | |
| Durability | Very Good✓ | Good |
