Head-to-Head
Glycerin FlexvsGuide 19
The Glycerin Flex and Guide 19 are both daily trainer shoes built for road running. The Glycerin Flex retails for $170 while the Guide 19 comes in at $150 — a $20 difference. The Glycerin Flex is the lighter shoe at 9.1 oz versus 9.7 oz for the Guide 19. In our ratings, the Guide 19 edges out the Glycerin Flex — 8.5/10 versus 8.0/10.
| Rating | 8.0 / 10 | 8.5 / 10✓ | |
| Price | $170 | $150✓ | |
| Weight | 9.1 oz✓ | 9.7 oz | |
| Category | Daily Trainer | Daily Trainer | |
| Terrain | Road | Road | |
| Cushion | Medium | Medium | |
| Softness | Balanced | Balanced | |
| Drop | Medium | Medium | |
| Drop (mm) | 6 mm | 6 mm | |
| Stack | 36 mm | 35 mm | |
| Stability | Neutral | Stability | |
| Fit | Narrow | Medium | |
| Energy Return | Low✓ | Low✓ | |
| Breathability | Medium | Breathable✓ | |
| Traction | High | High | |
| Shock Absorption | High | High | |
| Durability | Good | Very Good✓ |
