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Tire/Rim Question


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3 replies to this topic

#1 Vez

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Posted 26 January 2006 - 02:59 PM

Hi all.

Just a quick question about tires and rims for my 1993 Impreza AT AWD. Currently I have 14 inch rims with P175 70 14 winter tires on them. My mechanic happens to have a set of rims/tires from a Legacy Turbo (look like the ones that came stock with the 92-94 Turbos) that are in fantastic shape and he will sell to me very cheap. They are 15 inch rims with P195 60 15 Pirelli all season tires.

My question: can I safely (come summer) switch my rims/tires to the 15 inch ones mentioned above? If there will be problems can they be solved easily? Past experiences etc...

Thanks for your help in advance!

Vez

#2 NoahDL88

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Posted 26 January 2006 - 04:20 PM

They'll be fine. They're rarer wheels so don't go trashing them, but they'll fit.

#3 Vez

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Posted 26 January 2006 - 04:24 PM

I've heard that putting larger wheels on a car can affect the speedo amongst other things. Will it affect it with a 1" jump up or is that only if I was going to try and rock 18's or something?

#4 jamal

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Posted 26 January 2006 - 06:12 PM

Larger wheels don't make a difference, it's the overall diameter of the tire.

Generally, for every +1" in wheel diameter, you're going to want to go down 10% on the section, and one size wider.

So, like, a 195/60-15 would have about the same diameter as a 185/75-14.

Those 15s are going to be very, very close to the same height as your stock wheels. miata.net has a tire calculator that will tell you how close.

I have 205/55-16s in place of 185/70-14s, and my speedo is still pretty accurate. I checked with GPS and it was off by about 2 mph at 60, which is normal for any car.




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