Transmission question...

mathematics · 12-29-2012, 03:18 PM

Going from stock 17's which are a 45 (don't recall the width. I believe 225), to 285/30/20, does this really affect the transmission in a negative way? I'm aware of the speedometer readout error, but someone is telling me it stresses the transmission. To me it doesn't sound right. Yea, a bigger wheel and tire will add rotational mass, but so does adding passengers and/or cargo. Anyone want to chime in?

Kalidian · 12-29-2012, 08:02 PM

Yea I''m no expert but I don't see how bigger tires would result in transmission stress. That doesn't make any sense.

mathematics · 12-31-2012, 06:04 AM

Not just tires, bigger wheels and tires.

BJK1903 · 12-31-2012, 01:04 PM

I was actually talking to a guy yesterday who owned a BMW too. He said the same thing to me since I have an XI. He said if you change the width of the tires it will screw up the all wheel drive on the car. I'm no expert in cars but that didn't make sense to me. Does anyone with XI can charm in too?

12-29-2012, 03:18 PM	#1
mathematics Captain 69 Rep 994 Posts Drives: 08 328i e93 alpine white Join Date: May 2009 Location: Queens, NY iTrader: (0)	Transmission question... Going from stock 17's which are a 45 (don't recall the width. I believe 225), to 285/30/20, does this really affect the transmission in a negative way? I'm aware of the speedometer readout error, but someone is telling me it stresses the transmission. To me it doesn't sound right. Yea, a bigger wheel and tire will add rotational mass, but so does adding passengers and/or cargo. Anyone want to chime in? __________________ iPhone 6 Plus (iTunes library/iTunes radio/Waze, etc) to Airport Express via AirPlay. Toslink out of Airport Express to Helix P-Six DSP. PHD AF 1.C tweeters, PHD FB 4.1 midranges. Jehnert Door Cards and mid-bass'.
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12-29-2012, 08:02 PM	#2
Kalidian Lieutenant 8 Rep 514 Posts Drives: AW '09 E90 328xi Join Date: Oct 2012 Location: Toronto iTrader: (0)	Yea I''m no expert but I don't see how bigger tires would result in transmission stress. That doesn't make any sense.
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12-31-2012, 06:04 AM	#3
mathematics Captain 69 Rep 994 Posts Drives: 08 328i e93 alpine white Join Date: May 2009 Location: Queens, NY iTrader: (0)	Not just tires, bigger wheels and tires. __________________ iPhone 6 Plus (iTunes library/iTunes radio/Waze, etc) to Airport Express via AirPlay. Toslink out of Airport Express to Helix P-Six DSP. PHD AF 1.C tweeters, PHD FB 4.1 midranges. Jehnert Door Cards and mid-bass'.
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12-31-2012, 01:04 PM	#4
BJK1903 BESIKTAS - cArsi 17 Rep 164 Posts Drives: Space Grey - 2008 xi E92 Join Date: May 2012 Location: Boston - MA iTrader: (4)	I was actually talking to a guy yesterday who owned a BMW too. He said the same thing to me since I have an XI. He said if you change the width of the tires it will screw up the all wheel drive on the car. I'm no expert in cars but that didn't make sense to me. Does anyone with XI can charm in too?
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