absoluteBLACK Subcompact Premium Oval Chainring

Innovative design allows very small chainring use on 4x110BCD cranks but a SRAM 12sp or Dura Ace 11sp chain is recommended \n Chainrings are sold separately but must be used in 30+46 and 32+48 combinations \n Special bolts are included for 30t and 32t inner rings so no additional parts are needed \n Inner and outer oval chainrings are optimized with smooth shifting in mind, (6) upshifting ramps (outer ring), and (12) downshifting points (outer ring) \n Oval rings help the rider spin smoother and generate more power \n Example: 32t is equivalent to 30t at dead spot and 34t at the power zone \n Works with 2x chainring systems and does not require any modification to the front derailleur for use \n Compatible with crank models: Shimano DuraAce 9100, R9120, R9150 & R9170 Di2, Ultegra 8000, R8020, R8050 & 8070 Di2., 105 R7000, R7020, R7070, DuraAce 9000 & Di2, Ultegra 6800 & Di2, Shimano 105 5800. Not compatible with Power2max \n Designed in UK, manufactured in Poland