3/8″ 9T Cheap Wheel
3/8″ 9T Cheap wheel RSD Replacement Wheel Double Wall Black 36H
Some of the Walmart Type bikes have a 3/8″ Axle on the Rear.
Normally these days you would have a 14mm rear axle and 3/8 inch on your front wheel. If your wheel bearings got loose or you bent your rim this is your next rear wheel and its a higher quality wheel that the one that fell apart from Walmart or other department stores. Unsealed bearings. 36H Rear Black 20 x 1.75.