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R size rubber on GT350 rims?

svassh

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Can get a good deal on some Cup 2 tires, but they are 315/30 and 305/30 R size tires. Will they be ok on my standard 10.5 and 11" rims?
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MikeR397

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Can get a good deal on some Cup 2 tires, but they are 315/30 and 305/30 R size tires. Will they be ok on my standard 10.5 and 11" rims?
What’s a good deal?

I have two sets of thirsty R wheels...

Or I can get you a set for probably $9800 shipped with basically new cup 2s on them ;)
 

galaxy

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Not ideal
Why not? Those tires on non R size wheels will fit just fine. Look how stretched the sidewall is on R size wheels! That’s the only thing you'll lose. I can’t speak to the possibility of any rubbing due to any offset differences, but the tire will fit the wheel just great.
 
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svttim

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They are designed to be that stretched. I did not say they wont work, just not ideal
 

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JAJ

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I've gone through two sets of MPSC2's in R sizes on non-R OEM wheels. They work fine, so long as you leave the rear camber at around 1 to 1.2 degrees.
 

Bugz66rpg

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I have 325s on my rear non R rims. Fits just fine, will be going 305 on front when they need replacing
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