Enduro B-543 2Rs Enduro Max Cartridge, Id=1-9/16″ Od=2 W=9/32″ Review Posted by GiantPandaisy July 17, 2018 in Drivetrain Components MAX bearings are filled completely with high precision Grade 10balls for maximum load capacity No retainer means these bearings have 40 percent more capacity Cycling Enduro Outdoor Recreation Parts & Components Sports & Outdoors