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      08-05-2020, 02:56 PM   #9
m240ragtop
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Drives: 2020 BMW M240i Convertible
Join Date: Jul 2020
Location: Tallahassee, FL

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Now that I have the rims, I'm back to deciding on tires.

225/45R17 would be the correct size to keep the overall diameter at 25". I still want the best touring ride I can get, so I am thinking about going with a larger overall diameter.

A 225/50R17 is about 25.9" total diameter and is right on the cusp of being within the 3% max recommended diameter change. I think there is plenty of room in the wheel well for a larger diameter tire, with the stock suspension.

Another option is a 235/45R17, the overall diameter goes up to 25.3" which is very reasonable. The problem with this option is my rim is 7.5" wide and I am not sure if I can put a 235 on it.
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