ZORILO Mountain Bike Chain RingMaterial: 2014-T6 aluminum alloySurface: HBK (black blasting anodic oxidation)Tooth number specification: CNC 3/32"Features: ultra light, high strength, exquisite workmanship, exquisite carving.Applicable models: Road bicycle, folding bikeP.C.D.(B.C.D.)=110mm***********************************************110BCD refers..