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      11-02-2012, 07:46 AM   #1
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Alternate Tire Size for 245/50-18

Wondering if there was another more common tire size than the factory 245/50-18. Would like more of a selection of tires but don't want to affect speedometer readings, etc.
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      11-02-2012, 11:43 AM   #2
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My 2012 35i with sport package came with 245/45-19" tires on all wheels. I plan to change for non runflat 235/50-19". I dont like the existing low profile and prefer the non run flat tires. It will only have a small effect on the speed reading, that I can live with. As far as the runflat issue is concerned, I cant remember the last time I had a flat tire.
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      01-05-2013, 05:45 PM   #3
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Quote:
Originally Posted by Amber View Post
My 2012 35i with sport package came with 245/45-19" tires on all wheels. I plan to change for non runflat 235/50-19". I dont like the existing low profile and prefer the non run flat tires. It will only have a small effect on the speed reading, that I can live with. As far as the runflat issue is concerned, I cant remember the last time I had a flat tire.
Did you change your tires already? How is the ride on the new tire size plus non RFT?
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      01-06-2013, 09:54 PM   #4
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The problem I have run into is what tire to buy
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      01-07-2013, 03:45 PM   #5
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Quote:
Originally Posted by Amber
The problem I have run into is what tire to buy
Go to Tirerack.com
It has a great selection of tires and rims, it's always has an updated car specs.
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      01-19-2013, 09:46 AM   #6
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Latitude Tour HP by Michelin is what I'm looking at. I have it in my Acura MDX. I believe that it is also use by Lexus as their OEM tires on their RX 350.
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      01-19-2013, 04:44 PM   #7
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19" rim dimensions and tire size

Quote:
Originally Posted by BMWs View Post
Wondering if there was another more common tire size than the factory 245/50-18. Would like more of a selection of tires but don't want to affect speedometer readings, etc.
According to BMW CANADA the following, is the actual dimensions of the 19" alloy wheels and they do not recommend a aspect ratio higher than 45 for the 19" wheel. BMW CANADA will probably not support a higher aspect ratio than the original 18" tires on your vehicle.

The dimensions of the 19 inch double spoke alloy wheels are as follows: 8,5Jx19 EH2+ with an offset of 38mm. We do not recommend any tires with an aspect ratio higher than 45 for the 19inch wheel base. This is a result of extensive testing by BMW AG. Any non approved changes to the tire or wheel package would make the vehicle unpredictable and could cause issues with the suspension/steering.

Do you really believe BMW CANADA on this issue?
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