ABSOLUTE BLACK Chainring Absoluteblack Oval 64Mm 28T 4B Black – OV28BK Review Posted by GiantPandaisy June 10, 2018 in Drivetrain Components This fits your . Make sure this fits by entering your model number. OV28BK 5110846000913 Compatible with all 64mm 4 Bolt chainrings ABSOLUTE BLACK Cycling Outdoor Recreation Parts & Components Sports & Outdoors