This is a rim questionn for 1941-46 pickups. i have two different rim widths on my truck. one is 4" bead width the other is 5" bead width. I purchased some Coker tires 650/16r the tread width on these tires is about 5 1/4". They say the tires will fit on 4-5 ". I did measure the 4" rims from where they bolt to hub to outside of rim got 3". the 5" was 3 1/2".