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Interactive wheel and tire combination calculator.

As an example, here is a side by side comparison of my 17x8 RH AD Cups and my soon to be shod 17x7 Porsche 993 Cup IIs:



The Cup IIs shod with 205/50s are actually 4mm larger in profile, but .8"(20mm) narrower in tread width.

But in weight is where is gets interesting:



Typically 4 pounds lighter rotational mass. Zippy and sticky.

Have fun with your wheel specs. ;)

:wrench:
 

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It is very nice it has a graphic representation of both wheels' dimensions but I wouldn't put too much faith in the accuracy of the weight estimates. It appears to err on the positive side as far as weight goes.
 

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Agreed. It shows "typical weight". Actual weight will depend on the specific rims and tires used. Some are heavier than others.
The way it shows the dimensions and estimated clearances is helpful.
 

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Just tried comparing my future front setup from 17x7.5 et40 225/45/17s with 18x9.5 et40 225/40/18. They wouldn't allow it. Keeps either changing wheel width or tire size. Guess it doesn't like a little stretch
 
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