Aftermarket 19" compared to stock tires

shenard · 01-16-2008, 09:42 PM

What are you guys doing about the odometers? Aren't 235/35/R19 for front and 265/30/R19 for rear quite a bit different from factory wheels and ultimately will cause the odometer to be off? Are you guys recalibrating the odometers or are those sizes very close to stock?

VGR00 · 01-16-2008, 10:20 PM

Makes little to no difference. I have tracked my speed with my GPS unit and true speed as reflected by the GPS is still just under what is reflected on the car speedometer.

shenard · 01-16-2008, 11:05 PM

Quote:

Originally Posted by vgr02

Makes little to no difference. I have tracked my speed with my GPS unit and true speed as reflected by the GPS is still just under what is reflected on the car speedometer.

What about the miles you are putting on the odometer? Based on your theory it sounds like you would be artificially putting more miles on odometer and the trip meter would be slightly off?

Bulldog 6 · 01-16-2008, 11:42 PM

Quote:

Originally Posted by shenard

What are you guys doing about the odometers? Aren't 235/35/R19 for front and 265/30/R19 for rear quite a bit different from factory wheels and ultimately will cause the odometer to be off? Are you guys recalibrating the odometers or are those sizes very close to stock?

My odometer is 2 mph slower compared to my GPS.

deltree · 01-16-2008, 11:59 PM

Quote:

Originally Posted by shenard

What about the miles you are putting on the odometer? Based on your theory it sounds like you would be artificially putting more miles on odometer and the trip meter would be slightly off?

That depend. I don't know how our car measure the odometer, but if they measure by revolution then the bigger diameter will actually help you since you can travel abit further on the bigger wheel. It will be very minor though, but that what I think

nicks3 · 01-17-2008, 05:24 AM

It made a noticeable difference to my car. If you go 19" I would stick with 225 and 255 tyres as BMW do with their own 19" wheel option.

01-16-2008, 09:42 PM	#1
shenard Captain 43 Rep 796 Posts Drives: '09 X6 50i AW Join Date: Oct 2007 Location: Dallas, TX iTrader: (0) Garage List 2009 BMW X6 50i [0.00]	Aftermarket 19" compared to stock tires What are you guys doing about the odometers? Aren't 235/35/R19 for front and 265/30/R19 for rear quite a bit different from factory wheels and ultimately will cause the odometer to be off? Are you guys recalibrating the odometers or are those sizes very close to stock?
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01-16-2008, 10:20 PM	#2
VGR00 Major 54 Rep 1,497 Posts Drives: 430i Gran Coupe Join Date: Feb 2007 Location: Brisbane - Australia iTrader: (1)	Makes little to no difference. I have tracked my speed with my GPS unit and true speed as reflected by the GPS is still just under what is reflected on the car speedometer.
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01-17-2008, 05:24 AM	#6
nicks3 First Lieutenant 34 Rep 309 Posts Drives: 335d Xdrive Msport Plus Join Date: Oct 2006 Location: Midlands, United Kingdom iTrader: (0)	It made a noticeable difference to my car. If you go 19" I would stick with 225 and 255 tyres as BMW do with their own 19" wheel option.
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