Shimano xt fcm770 9 speed triple chainringsshimano xt fcm770 9 speed triple chainrings are the perfect replacement for old or worn chainrings on your shimano xt 9 speed triple chainset features material aluminium mount 4 bolt speed 9 bcd 64mm inner 104mm middle and outera 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products buyshimano componentsfrom chain reaction cycles the worlds largest online bike store