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The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets.
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Old 02-10-2013, 05:42 PM   #1
csa714
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Join Date: Jan 2013
Location: Reston, Va
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My Ride: 2004 330cic
style 71

Hi All -


I very much like the style 71 rims for my 2004 330 Vert...but...

1) A lot of sites I have gone to say they are not compatible (17") although others say they are...I have seen pics on this site with this style, but am thinking maybe they did a lot of mods top use them...

2) I would like to put 18" on her, but do not want to do any alterations - Can I run 18's without rubbing or restricting performance?

Soo - will the 17's work as an easy replacement, and if yes, will the 18's work as well?

Thanks for you help.
S
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Old 02-10-2013, 05:45 PM   #2
DonaldE
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Why wouldn't the 17's work. Caliper clearance?

2002 BMW 330i
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Old 02-10-2013, 05:48 PM   #3
csa714
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Quote:
Originally Posted by DonaldE View Post
Why wouldn't the 17's work. Caliper clearance?

2002 BMW 330i
Got me - I went to ebay for example to bid on 17" style 71 and was told they were not compatible - no idea why. Hoping the collective experience here in the forum can point me in the right direction.

I am thinking this guy was misinformed, but given I am new to BWM ownership I want to make sure...
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Old 02-10-2013, 06:00 PM   #4
DonaldE
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I'm not incredibly familiar with hub bores. But I'm fairly sure they should work

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Old 02-10-2013, 06:54 PM   #5
TJ710
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I have 18" OEM 71's on my car.

Last edited by TJ710; 02-10-2013 at 06:55 PM.
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Old 02-10-2013, 07:09 PM   #6
Jussblazn
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I also have 18" 71s on my car. My car has been dropped about .75 inch, so you shouldn't have any problems.


Last edited by Jussblazn; 02-10-2013 at 07:12 PM.
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Old 02-10-2013, 07:15 PM   #7
csa714
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Thanks guys - no problems rubbing? I assume the speedo is off because of the stock calibration to 17"...

I think the rims look fantastic- are they staggered like the 17's?
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Old 02-10-2013, 07:29 PM   #8
2003 325i
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Outside tire diameter remain the same, speedo remain the same
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Does anyone have a recommendation on which is the best high performance valve stems?
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Old 02-10-2013, 07:34 PM   #9
esberelias
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17" Style 71's deep dish rep's on a 03 325i... with no issues
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Last edited by esberelias; 02-10-2013 at 07:34 PM.
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Old 02-10-2013, 07:38 PM   #10
csa714
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Quote:
Originally Posted by 2003 325i View Post
Outside tire diameter remain the same, speedo remain the same
does the outside diameter remain the same? Seriously, if i go from 17 to 18 i would think that would change...if not i guess i slept though too many classes...perhaps I wrongly assumed I would need larger tires (and have changed the diameter) or maybe just lower profile tires on the 18's...sorry my mechanical skills suck, but I am fairly adept at math.

Like I said, trying to figure all this out.
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Old 02-10-2013, 07:46 PM   #11
csa714
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a link to speedo rim/tire size calc

http://www.web-cars.com/math/tiresize.html

enter wheel size, tire width and aspect ratio and it will provide the speedo differential
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Old 02-10-2013, 08:25 PM   #12
Kemer1
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Quote:
Originally Posted by csa714 View Post
does the outside diameter remain the same? Seriously, if i go from 17 to 18 i would think that would change...if not i guess i slept though too many classes...perhaps I wrongly assumed I would need larger tires (and have changed the diameter) or maybe just lower profile tires on the 18's...sorry my mechanical skills suck, but I am fairly adept at math.

Like I said, trying to figure all this out.
You offset the difference in the wheel diameter with a difference in the aspect ratio of the tire.

Lets say you had 225-50-17 stock tires and replaced them with 225-50-18 then yes you would have issues with the speedo because the outside diameter of the tire would be larger. If you replaced them with 225-40-18 then the outside diameter would be the same and no issues with the speedo. These sizes were hypothetical and used only for explaining the concept.
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Old 02-10-2013, 08:34 PM   #13
csa714
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- I thought i was going insane when the one coy reply came back, I know school was 20 years ago but damn! I understand and thanks for the explanation.
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