- Shimano Dura-Ace 9000, Ultegra 6800, Shimano 105 5800, Tiagra 4700. Compatible with Di2 & Pioneer, SRM and other power meters
- Inner and outer oval chainrings are optimized with smooth shifting in mind
- Features smooth angled surfaces, (6) up-shifting ramps (outer ring), and (12) down-shifting points (outer ring)
- Oval rings help the rider to spin smoother and more efficiently
- Example: 32t is equivalent to 30t at dead spot and 34t at the power zone
- Works with 2x chainring systems and does not require any modification to the front derailleur for use
- Designed in UK, manufactured in Poland
| Model | Premium Oval |
| Ring Type | Inner, Outer |
| Speed | 2x9/10/11sp |
| Mount | 4x110mm |
| Teeth | 36, 50 |
| Oval/Round | Oval |
| Color | Black |
