I have the 255 60-15 on my 75 with no problems. BUT they are too big by Chevy specs. Many folks believe our cars had the same as 225 70 -15, but that's not true. They came with F70-15 which was smaller than a 225, and just a touch smaller than 215, in a 70 series ( about a 211 or 212). Oddly the 255 60 is almost the same outer size as the F70.
In 78 when the new C3 came in we thought there was a problem with the fenders, they were notched at the rear of the front wheels, and to a lesser degree at the front. Then we found this was a mod to allow the 255 60 tires. In 79 you could not see this trimming, and the wheel wells and fenders were modified to allow the larger tires. (Yes I was working for Chevy starting in 77 until the early 80's)
Some early C3s won't allow the 60s no matter what. There were just too many varitions in body construction. Not tight tolerances. Some will not work with worn springs. I put new spring in the front and rebuild the front end. Mine clear, but yours may not.
kstyer2009-04-10 14:45:25
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