I have 15x8 rallyes with a 4" backset. (If you look at the photo in my signature, you'll see what I'm talking about.) I have 255/70's on there now that need replacing (obviously!). To my eye, these tires just seem too tall and fill the wheelwell a bit too much. I know it's a subjective thing but I'm looking for suggestions on a smaller tire that gives me the same, or more, treadwidth. Would the simple answer be something like a 275/60? TIA.

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Yella
My 67 SS (http://chevelles.com/showroom/yella67ss/67Project.JPG)

I run a 295-50/15 on the back of my 66, but I had to have the rim offset to fit it (stock 15X8 ralleys aren't offset properly to get the maximum tire back there...). I have not modified the wheel lip at all...

Maybe check out some tire company websites... I think I have seen some with specs...

Check out the pics in my signature (althought not the best shots for seeing the tire clearance... I use to have the car 4-5 inches lower (but same wheels and tires) with no problems...

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"Once you go RAT, you never go back..."
TC #1366
Tony
The Chevelle (http://www.chevelles.com/showroom/1966_L78/ChevelleA.jpg)
Dual Quad 396 (http://www.chevelles.com/showroom/1966_L78/ChevelleC.jpg)
Side View (http://www.chevelles.com/showroom/1966_L78/ChevelleD.jpg)

I have researched the same thing on my 67 and it looks like the 275/60 on the back with a 4 or 4 1/2 back spacing will work fine. Personally I think I'm going with the 4 1/2 in the back with a 4 in the front,with a 215/70.

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If it's too fast your too slow!!!
TC#1695

I run 15 x8 rally wheels on all four corners.....the offset is 4-1/2". I have 235/60-15 tires up front, 26" tall and 295/50-15 tires in back 26-1/2" tall. The 295s fit perfectly with plenty of clearance.

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1967 SS Chevelle Project
S.C.C.C.C Member
A.C.E.S. Member
http://home.pacbell.net/yldinks/Chevelle.html