Head-to-Head
Guide 19vsAero Razor
The Guide 19 is a daily trainer shoe while the Aero Razor is a speed trainer shoe. The Guide 19 retails for $150 while the Aero Razor comes in at $140 — a $10 difference. The Aero Razor is the lighter shoe at 6.9 oz versus 9.7 oz for the Guide 19. In our ratings, the Aero Razor edges out the Guide 19 — 8.9/10 versus 8.5/10.
| Rating | 8.5 / 10 | 8.9 / 10✓ | |
| Price | $150 | $140✓ | |
| Weight | 9.7 oz | 6.9 oz✓ | |
| Category | Daily Trainer | Speed Trainer | |
| Terrain | Road | Road | |
| Cushion | Medium | Medium | |
| Softness | Balanced | Firm | |
| Drop | Medium | Low | |
| Drop (mm) | 6 mm | 4 mm | |
| Stack | 35 mm | 36 mm | |
| Stability | Stability | Neutral | |
| Fit | Medium | Narrow | |
| Energy Return | Low | High✓ | |
| Breathability | Breathable | Breathable | |
| Traction | High | High | |
| Shock Absorption | High✓ | Medium | |
| Durability | Very Good✓ | Good |
