Product DescriptionThis rear rim assembly fits the CT100U mini bike. On both sides of the rim, there are round mounting flanges for the rear chain sprocket and disc brake rotor to attach to, using (6) 6mm*1.0 bolts on each side.Rim details:Rear Wheel assemblySilver colorRim width: 104mm [4.1] InchesRim diameter: 6 InchesOverall width: 180mm [7.1″]Includes bearingsUsed with 145/70-6 tire41200/HS100 Fits CT100U mini bike. May fit other makes and models of mini bikes. Please look at pictures and check the description before ordering. This rim is very similar to the DB30 disc brake wheel.