RockShox Lower Leg ZEB Ultimate A1+ Zeb Flight Attendant A2+ 2023+ 27.5" 15 x 110 mm Gloss BLK ModelNumber=19456 Its proprietary design has an Its proprietary design has an ovality of 10% and a timing of 112 degrees after top dead center which provide the beneifits of an oval ring such as greater rear wheel traction without the traditional downsides of oval rings The uninterrupted shifting experience of the Shimano Dura Ace R9200 12 speed cassette range lets you climb sprint and push your limits without stopping to think about your next gear change list style position:outside }RockShox Lower Leg ZEB Ultimate A1+ Zeb Flight Attendant A2+ (2023+) 27