Head-to-Head
Streakfly 2vsGlycerin 23
The Streakfly 2 is a race shoe while the Glycerin 23 is a daily trainer shoe. The Streakfly 2 retails for $180 while the Glycerin 23 comes in at $175 — a $5 difference. The Streakfly 2 is the lighter shoe at 5.1 oz versus 10.6 oz for the Glycerin 23. In our ratings, the Streakfly 2 edges out the Glycerin 23 — 8.9/10 versus 8.0/10.
| Rating | 8.9 / 10✓ | 8.0 / 10 | |
| Price | $180 | $175✓ | |
| Weight | 5.1 oz✓ | 10.6 oz | |
| Category | Race Shoe | Daily Trainer | |
| Terrain | Road | Road | |
| Cushion | Low | Medium | |
| Softness | Soft | Balanced | |
| Drop | Low | Medium | |
| Drop (mm) | 4 mm | 8 mm | |
| Stack | 27 mm | 38 mm | |
| Stability | Neutral | Neutral | |
| Fit | Narrow | Wide | |
| Energy Return | Very High✓ | Low | |
| Breathability | Breathable✓ | Medium | |
| Traction | Medium | Medium | |
| Shock Absorption | Low | High✓ | |
| Durability | Bad | Very Good✓ |
