[terryhelms76]

I have a 75 vette that has 15 inch rims on it and 235/60/15 tires I was wanting to know sence 15 are getting harder to find without paying a arm and a leg if I could go to a 16 inch and what size tire if it would work without rubbing or anything????

[S10 Racer]

Originally Posted by terryhelms76

I have a 75 vette that has 15 inch rims on it and 235/60/15 tires I was wanting to know sence 15 are getting harder to find without paying a arm and a leg if I could go to a 16 inch and what size tire if it would work without rubbing or anything????

All you would need is 235/60/16 tires.

[joe_padavano]

Originally Posted by S10 Racer

All you would need is 235/60/16 tires.

And this is why you should have stayed awake in math class.

Keeping the same tire size and simply increasing the wheel diameter increases the overall diameter of the tire. The 235/60-15s are 26.1" in diameter. The 236/16-16s are 27.1" in diameter. The exact replacement is a 235/55-16, which is within a tenth of an inch of the originals in overall diameter. Of course, any offset differences between the 15" and 16" wheels will cause far more clearance issues than tire diameter.

By the way, I don't know where the OP is shopping for tires, but at TireRack.com, BFG 235/60-15s are $110 each. The 16" 235s are no cheaper in either 60-series or 55-series. Add the cost of the new wheels and it definitely makes no sense financially.

[S10 Racer]

Originally Posted by joe_padavano

And this is why you should have stayed awake in math class.

Keeping the same tire size and simply increasing the wheel diameter increases the overall diameter of the tire. The 235/60-15s are 26.1" in diameter. The 236/16-16s are 27.1" in diameter. The exact replacement is a 235/55-16, which is within a tenth of an inch of the originals in overall diameter. Of course, any offset differences between the 15" and 16" wheels will cause far more clearance issues than tire diameter.

By the way, I don't know where the OP is shopping for tires, but at TireRack.com, BFG 235/60-15s are $110 each. The 16" 235s are no cheaper in either 60-series or 55-series. Add the cost of the new wheels and it definitely makes no sense financially.

You could have corrected me without your sarcastic remarks. It's guys like you that run people off of HR.

[tnovot]

Go to the Corvettefourm.com. Find the C3 section and at the top of the page, there is a search function. Plenty of stuff on different size wheel and tire combos for your '75. Many guys want to go to a bigger tire and some like to stay with the 15's. I just bought a set of 255-70-15 General Altamax from Discount tire for my '75 Stingray and am very satisfied staying with the OEM size, especially since mine has the 79-80 alloy wheels.
Terry