SHIMANO 110 BCD R9100 (4-bolt AERO) Round AERO Narrow Wide Chainring

Model  46T or 48T or 50T or 52T or 54T or 56T or 58T Colour Black Made from 7075-T651 Aluminum Alloy Surface coating Anodizing Made with CNC milling Chainring shape Round Compatible cranksets 110 BCD (4-bolt AERO)  Shimano FC-R9100 - Dura-Ace Weight, grams  118 (46T), 119 (48T), 137 (50T), 155 (52T), 171 (54T), 184 (56T), 194 (58T) Chain compatibility Support 9/10/11/12 speed Ordinary chain   Support paying an extra $10 to customize the same silver color  Bicycle shop or dealer contact customer service              PASS QUEST NARROW WIDE CHAINRING R110BCD is made ofa whole aluminum plate by CNC millingThe back is hollowed out and chamfered to ensure strengthwhile reducing the weight of the chainring. The chainringadopts an extended tooth shape, so even if the chain jumpsviolently, it is difficult to get out of the teeth,so as to prevent the chain from falling off. Our tooth height achieved 8.5 mm, Increased tooth