255 70 15 vs 275 60 15

[charger_fan_4ever]

Hello all,

Anyone run a 255 70 15 on the rear of a 68-70?
I planned on running 275 60 15s on 8.5 wide rim with 4 inch back spacing.Thinking i was still geared 3.23.ends up im 3.91 so a taller tire would help bring down the rpm.

The 255 70 is 29 inchs vs 28 for the 275 60.
Anyone have any pics? Will they fit?

Thanks

[RallyeMike]

A 29 inch tire vs 28 inch tire, and 3.91 gears, the mph difference at 3000 rpm is 2 mph. Not enough to make any real difference.

I have never run a 255/70/15, but they will fit anywhere a 275/60/15 will.

[472 R/T SE]

I run 275 & 235.  It had 255 all the way around when I purchased it.
8" or 8.5" on rear, crs.

I wanted 295 but didn't like the shorter height vs. 275.  In my research, the 275 give me the most of what I wanted, some width & height.

I can get a finger between the outer well & tire.  Still struggling with posting pix...


Im not concerned with the height running a GV OD.

[472 R/T SE]

https://www.dropbox.com/s/uooxz96wywnita1/chrysler%20rt%20club%205-08%20%28154%29.jpg?dl=0