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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > Going from 16" to 19" questions.



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      01-25-2011, 09:53 PM   #1
sy2767
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Going from 16" to 19" questions.

I will be up sizing the wheels on my 325i from stock run-flat tired 16" to non run-flat tired 19". How much off will my speedo be? Fuel mileage? performance? Any thing else i should know before i jump into this?
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      01-26-2011, 01:18 AM   #2
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No one..........?
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      01-26-2011, 01:40 AM   #3
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Well there is a calculator right at the top of this forum to answer your speedometer question...

It depends on the profile of the stocks and new tires. It is technically possible to go from 16" to 19" and not actually change diameter, and therefore not affect the speedometer.

Mileage and performance could be hindered if the new setup weighs more. Obviously heavier wheels require more power to get them rolling.
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      01-26-2011, 01:03 PM   #4
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As long as you run the proper diameter tires you will still be within 3% of the OE tires. I personally upgraded from 16" wheels to 19" and I like the crisp response to the steering that I gained. With the thinner and wider tires I can definitely feel the difference in lateral grip during higher speed corners.

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