Shimano xtr fcm985 10 speed double chainringshigh quality shimano xtr chainrings only compatible with the xtr fc m985 xc crankset 2x10 speed and cn m980 chain 10 speedspecificationsmaterial outer inner chainrings 7075 aluminumweight approx 100 gram 44 teethchainwheel number of teeth 28 30 32 40 42 44fitting for derailleur 10 speedbolt circle mm 88mmcolor dark greyincluded in delivery one chainring without chainring screwsa 2 year warranty is offered with all shimano produ