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      10-03-2016, 12:14 PM   #14
LevinBR
Private First Class
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Drives: 2013 BMW X1 xDrive 35i
Join Date: Feb 2016
Location: Colorado

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Quote:
Originally Posted by Abbie View Post
Hello everyone!

So i just swapped my run-flats with conventional tires R18 tires and getting ready to pull the trigger on a spare/space saver and realize that no one has addressed the following question.

does the spare tire/wheel need to be of the same diameter?

So... to be specific, if my car has 225/45R18 tires on it, do i need to consider a "17 spare or "18 spare?

Thanks everyone for weighing in!
Abbie, how does the ride feel with conventional tires? Is it smoother than it was with run-flats?
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