Shimano FC-R9100 Dura Ace Chainring – 55t

##Shimano FC-R9100 Dura Ace Chainring – 55t The A Shimano FC-9100 Chainring 55T-MX is a 55 tooth replacement or upgrade outer chainring that is compatible with the 11 speed Dura-Ace 9100 series double chainset; for use with an inner ring of 42 teeth. This four-arm outer chainring is machined from aluminium and carbon; giving both greater rigidity and lighter weight than its predecessors; and with that rigidity comes improved shifting for accurate gear changes every time.