9 x 22.5 do not need 6.75 rims. They fit fine on my stock 5” width rims. They also fit fine on 6” rims.

I think 10 x 22.5 would be way overkill for your truck!
Ed
Attachments
24A27D0B-B4CE-4FA1-9916-1734F9AC6284.jpeg (430.57 KB, 106 downloads)

Last edited by EdPruss; 08/30/2022 3:03 AM.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.