16001ZZ 16001 2Z 16001 ZZ bearing 10mm x 28mm x 8mm ATV Gas Scooter DB49 Bike "d" (shaft or inner diameter) = 10mm (.4") "D" (outer diameter) = 28mm (1.11") "B" (width) = 8mm (.316") "r" (radius) = .5mm (.020") Please check measurements BEFORE THE PURCHASE