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Topic: Switching from 8R 19.5 to 225 70 19.5 (Read 659 times) previous topic - next topic

Switching from 8R 19.5 to 225 70 19.5

We have 6" wheels...  we are having trouble finding sources for the older style 8R tires... 9 hours on NM hwy waiting on AAA to find our tire size....  can we swap out for the more popular ( in stock) 225 70 19.5 ??  We have found  Continental HDR ( F) ... 

We want to replace all 4 drive tires and see if there are other options for the steer tires. .  Thanks in advance for advice... 
1986 Grand Villa, 454 Chevrolet, 33 SBI tag axle
Build # 2658
2nd owner, original owner was Newman/Freeman Racing, racer Bill Freeman and actor/racer Paul Newman

Re: Switching from 8R 19.5 to 225 70 19.5

Reply #1 –
read this
The Effects of Changing From 8R19.5 to 225/70 19.5 Tires | It Still Runs
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Switching from 8R 19.5 to 225 70 19.5

Reply #2 –
Quote from: craneman –
read this
The Effects of Changing From 8R19.5 to 225/70 19.5 Tires | It Still Runs

Great.    We have measured our spare tire wheel and measure 7".  Could this be right ?  Stock wheels for the original 8R would have been 5.25" ???  Are we measuring rim to rim ?  Or is there an inside rim measurement that is being used ? 
1986 Grand Villa, 454 Chevrolet, 33 SBI tag axle
Build # 2658
2nd owner, original owner was Newman/Freeman Racing, racer Bill Freeman and actor/racer Paul Newman

Re: Switching from 8R 19.5 to 225 70 19.5

Reply #3 –
The correct  rim  width measurement is  tire bead to tire bead. So if the outside width of the rim is 7in , the bead will be about 1 in or a little less like 5.5 or 6 in.
 Googlate it , should be pics.