ACCTUALLY ! i was do at the Truck stop and they offer both hub and stud pioted rim's in 22.5 and 24.5. . .
so as long as they meaure the same stud they can be swapped I did see an army rig with 11R22.5 T-831 traction tread's so a 24.5 will bolt right up. . .
the old 11.00-20 is 42" actual inches tall as the 12R24.5 is 46" actual inches tall well in the G-177 Radail Mud Grip. . .they'll only be about 2" shorter then the 14.00R20 and 4" shorter than the 16.00R20. . .
but i'll have an Over drive or 2 to make up the difference. . .

I'll just build another " mikeyplex " 15 spd. . .

MIKEYPLEX 15spd:
mack 5spd 5th= .76:1 3 spd auxy 3rd= .85:1 giving you .61:1 whitch is what i did for my B61T it went from running 58mph@2250rpm to 72mph@2,000rpm. . . with out a tire size changed. . .doing the same for the 10 Ton but i'm swaping the 5spd for a 7spd a little better split for the KT cummins . . .

Mike D


1962 GMC K3000, GMC-379 V6.