FEATURES: Inner and outer oval chainrings are optimized with smooth shifting in mind Features smooth angled surfaces 6 up-shifting ramps (outer ring), and 12down-shifting points (outer ring) Oval rings help the rider spin smoother and generate more power Example - 32t is equivalent to 30t at deadspot and 34t at the power zone Works with 2x chainring systems and do not require any modification to the front derailleur for use Compatibilty: SRAM cranks that have (1) hidden chainring bolt (Force22, Red22) Designed in UK, manufactured in Poland SPECS: 2x9/10/11sp 5x110mm 34T Black