The 23-136 is a standard hanger for doors up to 125 lbs. The wheels are not ball bearing. The width of the center of the wheel to the center of the wheel is 1-7/32", take a look at the included image.

Alternate view of 23-136 with measurements
The 23-136 is a standard hanger for doors up to 125 lbs. The wheels are not ball bearing. The width of the center of the wheel to the center of the wheel is 1-7/32", take a look at the included image.