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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 06-06-2005, 08:13 PM
simoncpw simoncpw is offline
Psymon
Location: Singapore
 
Join Date: May 2005
Posts: 196
Mein Auto: X3
Sizes of wheels

Hi there,

Just got my X3 2.5i, it came with the alloy rims:

Style 148, 235/55R17

If I were to changed to the:

Style 114, 235/50R18 (front) and 255/45R18 (rear)

Will I get a significant drop in pickup / acceleration performance?


Thanks

Psymon
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  #2  
Old 06-07-2005, 04:04 AM
motordavid's Avatar
motordavid motordavid is offline
RetiredBum
Location: Mtns of Western NC & SW FLA
 
Join Date: Sep 2004
Posts: 749
Mein Auto: '01 X5 3.0 '02VetteVert
A handy lil'link below to do some arith on wheel size, etc.
With the diff front/rear, you can't calc Exact, but the "rear to rear" diff
you are wondering about is minimal. Doubt test equip could record
a diff 0-60 speed, etc. Would look "cool" but not impact much, imo.
GL,md

http://www.powerdog.com/tiresize.cgi

235/55-17 5.1" 13.6" 27.2" 85.4" 742/mi 60MPH 10000mi N/A
255/45-18 4.5" 13.5" 27.0" 84.9" 746/mi 60MPH 10052mi -0.5%
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'01 X5 3.0 Sport, 5 Spd Manual, etc.
'02 VetteVert 6 Spd, Z51 susp.
'10 Hyundai Tucson for the CEO, & 3 Assorted M'Cycles.
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  #3  
Old 06-07-2005, 04:44 AM
simoncpw simoncpw is offline
Psymon
Location: Singapore
 
Join Date: May 2005
Posts: 196
Mein Auto: X3
Thank you very much for the reply.

Do you have any recommendation for tires?

Where I live is summer all year (dry mostly), with a bit of short rain showers. Quieter tires will be good!

Thanks again.
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  #4  
Old 06-07-2005, 12:22 PM
motordavid's Avatar
motordavid motordavid is offline
RetiredBum
Location: Mtns of Western NC & SW FLA
 
Join Date: Sep 2004
Posts: 749
Mein Auto: '01 X5 3.0 '02VetteVert
You are welcome, Simon.
No clue on tire brands, but if you don't get some ideas/opins in this thread,
repost your tire brand question in new thread.
I loved Singapore the few times I was there!
GL,md
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Ol'Uncle Motor
'01 X5 3.0 Sport, 5 Spd Manual, etc.
'02 VetteVert 6 Spd, Z51 susp.
'10 Hyundai Tucson for the CEO, & 3 Assorted M'Cycles.
BMW CCA mem. Tarheel Chapter
My Flickr...Scenes,Cars & Road Trip Pics:
http://www.flickr.com/photos/45275375@N00/
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  #5  
Old 06-07-2005, 11:13 PM
simoncpw simoncpw is offline
Psymon
Location: Singapore
 
Join Date: May 2005
Posts: 196
Mein Auto: X3
Thanks, David.

One of the problems about Singapore is the cars are hugely expensive, and there are very few car specialists / dealers who really know the stuff, including the BMW dealers themselves. The sales person didn't even know if my car had Cruise Control (not that it is important in Singapore)!
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  #6  
Old 06-19-2005, 01:51 AM
canadianbattery canadianbattery is offline
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Location: Toronto, Canada
 
Join Date: Jun 2005
Posts: 154
Mein Auto: X3 2005
I just bought a 19" rim with Pirelli PZero Rosso Asimmetrico 245/45/19, pretty good. Quiet and comfort
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