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:confused0006: Rusty here, need some help with tire size, I have tried to do the foot work myself but no luck. What I need to know is what size metric tire will replace an old tire that is on a 1977 camaro that is a GR 70 15, to the metric tire size that is used today.

Thanks,
 

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If your car had G70-15s it must be a Z28 and the tire that replaces it is a 225/70/15. If your car was a 70-74 Z28 it would have F60-15s or 235/60/15. I dont care what some silly calculator says.
 

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If your car had G70-15s it must be a Z28 and the tire that replaces it is a 225/70/15. If your car was a 70-74 Z28 it would have F60-15s or 235/60/15. I dont care what some silly calculator says.
Are you saying an F series tire is larger than a G series? I just found the silly calculator.
Jim
 

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No I was justy telling you the size tires Z28 came with in the 1970s.

70-74 F60-15
77-? G70-15
?-81 225/70R15

Sometime in this period the commie metric system came in
 

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I didn't see him mention Z-28 anywhere. He said 77 Camaro. 75-77 never had a Z-28 version made!
I never said they made 75 or 76 Z28s because they didnt, but they sure as [email protected]!! made 77s and If you read my post I said if your car came with G70s it must be a Z28. Why because standard Camaros of that era had 14x6 or 14x7 wheels. You need to check your facts and read what was said on this one before you post.

If you google 77 Z28 it looks a lot like a 74, biggest difference in appearence is wrap around rear window. Do you know why it has a wrap around window. In 74 IROC changed from running Porche to Camaro and the drivers complained about a blind spot. GM fixed it for the 75 model year.
 

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Ok. Sorry, I stand corrected. I bought a '75 Camaro in '78 and still own it. I knew there wasn't a Z-28 in that year and '76. I do remember '78 Z's had the plastic front/rear bumper covers. It seems to me the '77 was the same as the '76 without bumper covers.
 

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I sold my first 75 in 79 to fund the purchase of my first 74 Z28, Proud to say I own a couple of each today. Rubber bumper cars rate with BMWs and other lower life forms/
 
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