absoluteBLACK Premium Oval Road Chainring 4x110BCD 50T Blk

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