| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | What is the boltpattern diameter? These are stud piloted. Yours should be hub piloted, are your rear wheels 10 bolt? If so, you have 5/10 on 7.25" hubs. Earliest tubeless 22.5 tires and wheels came on late '50's GM 1.5 ton trucks, hard to find, look on farm trucks. If found, need thin spacer ring(easily made) to fit to old axles. 19.5 wheels are common, look under nourished on this size truck.
Ed
'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.
| 
