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Discussion Starter · #1 ·
So I got this set of American racing 505s new in box from 02 (still made in the USA) with purchase of my car. I'm now to the point of looking for tires for my car and I thought I would look at forums to ballpark what tire size I should even think about buying but I noticed most sizes are for 4 to 4,5 backspacing. After plugging the dimensions on my box in to a online calculator it looks like I have 3.79 backspacing on the rear and 3.8 on the front (I'll include pictures of the labels). What tires should I get - I've never done this before so I don't know what I'm doing - I'd like to go as fat as I can in the rear but I know that could be a challenge with the weird backspacing
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Discussion Starter · #2 ·
So these are my cousin's wheels 255 60 R15 on a 15x8 and 5 inch backspacing with a 1.25 inch spacer. This is absolutely perfect fit for me the only thing that would make these better would be if they were 275s
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Discussion Starter · #3 ·
After a lot of research I believe the largest size I could fit in the rear with my backspace would be 255s and I think I will go with 215s on the front. I kinda like the look of bigger tires filling out the wheelhouses so could I do 255/65r15s rather than 255/60r15s to get that look or will they rub? Also for the front could I do 215/65 or 70 r15s instead of 215/60r15s?
 

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After a lot of research I believe the largest size I could fit in the rear with my backspace would be 255s and I think I will go with 215s on the front. I kinda like the look of bigger tires filling out the wheelhouses so could I do 255/65r15s rather than 255/60r15s to get that look or will they rub? Also for the front could I do 215/65 or 70 r15s instead of 215/60r15s?
Did you ever get an answer? I doing same thing trying to get larger tires on 15x7 (front) and 15x8 (back) rims
 

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70 Cougar 351C 4 barrel with 4 wheel disks custom interior getting new paint mild cam AOD trans
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After a lot of research I believe the largest size I could fit in the rear with my backspace would be 255s and I think I will go with 215s on the front. I kinda like the look of bigger tires filling out the wheelhouses so could I do 255/65r15s rather than 255/60r15s to get that look or will they rub? Also for the front could I do 215/65 or 70 r15s instead of 215/60r15s?
I am running 255/60 15; on my 70 and I could go up a size or 2 or a lot more with more backspace
 
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