Tires: 8r vs 245/70, pacearrow, 8r


Question
I found this question posted here;
My motorhome has 225/70/19.5 tires on it now. Think about 8r tires. I know there a little taller and not as wide. Will this hurt the motorhome and will these tires be safe.
First I like to say how impressed I was with the detail of answer.
My question is to deal with the reverse. My 87 PaceArrow Eleganza came with 8r 19.5. I had 245/70 19.5 put on the front (made a good difference in handling). How close are 245 and 8r's in height. Is this a good idea to put on the rear? I don't know the rim width or spacing. Thanks for your time

Answer
Remmik,

An 8R19.5 is 33.8" is diameter, 8.0" wide, fits on a 5.25" to 6.75" rim, has a minimum dualled spacing of 9.1" and has a load carrying capacity 3070# @ 95 psi for a dualled Load Range F.

A 246 70R19.5  is 33.0" in diameter, 9.8" wide, fits a 6.75" rim only, has a minimum dualled spacing of 11", and has a load carrying 3860# at 95 psi for a dualled Load Range F.

I think you can see that putting a 245/70R19.5 is going to be a problem in the duallie postions.