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      05-03-2012, 11:31 AM   #1
SyL3nTFoRcE
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Rim and Tire sizes for XI

Found the info for previous question new question.

I have 19x8 square but now im going to get 19x9 fronts and 19x10 rear but what tires size should i get? i am going to lower my xi in the near future, im thinking 235/40/19 front and 275/45/19 rear. i see that its all about rolling diameter with the tires but how do i measure it exactly?

any opinions will be helpful

Last edited by SyL3nTFoRcE; 05-03-2012 at 12:34 PM.
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      05-03-2012, 12:31 PM   #2
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      05-03-2012, 12:35 PM   #3
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i know i know i did my research further on and found it but now the thing is figureing out the right sizes
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      05-03-2012, 12:56 PM   #4
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235/35/19 & 275/30/19

Go to Tirerack and look at the specs of the tires. They post revs per mile for each tire size.
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      05-03-2012, 01:27 PM   #5
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my stock rim size is 205/55/16 revs per mile 838 ovarall diam. 24.8 or 225/45/17 revs per mile 832 overall diam 25, but my car came with 335i sport rims when i bought it used, i dont have sport seats or steering wheel so my take is its the 16"

now i looked up the tires

235/35/19 are revs per mile 816 and overall diam.25.5
275/40/19 revs permile 751 and overall diam is 27.7

something tells me these wont be good for my car?
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      05-03-2012, 06:39 PM   #6
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any input?
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      05-03-2012, 06:43 PM   #7
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Quote:
Originally Posted by SyL3nTFoRcE View Post
my stock rim size is 205/55/16 revs per mile 838 ovarall diam. 24.8 or 225/45/17 revs per mile 832 overall diam 25, but my car came with 335i sport rims when i bought it used, i dont have sport seats or steering wheel so my take is its the 16"

now i looked up the tires

235/35/19 are revs per mile 816 and overall diam.25.5
275/40/19 revs permile 751 and overall diam is 27.7

something tells me these wont be good for my car?
Just change the 275/40/19 to 275/30/19.
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      05-03-2012, 09:30 PM   #8
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yup im definately selling my wheels and goin staggered........275/30/19 are perfect still within that 1" rolling diameter if the overall diameter is what im suppose to be measuring
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      05-03-2012, 09:41 PM   #9
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Quote:
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any input?
http://www.e90post.com/forums/showpo...69&postcount=4
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      05-05-2012, 12:54 PM   #10
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Use a tire calculator, free app on iPhones. Keep rolling diameter under 1. Good to go.

Easy peasy.
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      05-07-2012, 02:04 PM   #11
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http://www.1010tires.com/ gives you OEM tire specs and you can compare it to what you're planning on getting. It'll give you the percentage increase/decrease of your current tires compared to what you plan on getting. Arguably, you'll want overall diameter to be within 1-3% of the OEM size especially with the AWD.
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      05-07-2012, 03:24 PM   #12
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im running 245/35/19 and 275/30/19 hankook ventus v12 on my e90 328xi lci. no problems whatsoever

KNOCK ON WOOD!!!
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      05-10-2012, 02:53 AM   #13
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im running 245/35/19 and 275/30/19 hankook ventus v12 on my e90 328xi lci. no problems whatsoever

KNOCK ON WOOD!!!
What size wheels and offset do you have for the front? I'm planning to run 19x9.5 concave with 245/35/19 on all four corners.
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      05-10-2012, 09:50 AM   #14
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What size wheels and offset do you have for the front? I'm planning to run 19x9.5 concave with 245/35/19 on all four corners.
not sure about the offests I just went with the recommended specs from forgestar, you wont be able to go that concave on the front though
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      05-10-2012, 04:43 PM   #15
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Originally Posted by jwise36
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Originally Posted by Cid369 View Post
What size wheels and offset do you have for the front? I'm planning to run 19x9.5 concave with 245/35/19 on all four corners.
not sure about the offests I just went with the recommended specs from forgestar, you wont be able to go that concave on the front though
Damn that's sux. I really love the look with concave front and rear like the EVO X. Well, I guess I'll just do more research and maybe somehow some way I can make it work.
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      05-16-2012, 12:41 PM   #16
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Quote:
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im running 245/35/19 and 275/30/19 hankook ventus v12 on my e90 328xi lci. no problems whatsoever

KNOCK ON WOOD!!!
Out of curiosity - why didn't you put 285's in the rear to go with your 245 up front? I am most likely going with this set up and it is a 0% Rev/Mi diff at 806 a piece

You didn't have to put spacers in the front for the 245? Are your fenders rolled in the rear?
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      05-16-2012, 04:04 PM   #17
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Out of curiosity - why didn't you put 285's in the rear to go with your 245 up front? I am most likely going with this set up and it is a 0% Rev/Mi diff at 806 a piece

You didn't have to put spacers in the front for the 245? Are your fenders rolled in the rear?
no roll no spacers, everything works just fine. the back is a deep concave aggressive offset, the 285s would stick out a little too much
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      05-18-2012, 08:42 AM   #18
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I have 08 335xi e90.... sport package.... Avant Garde M310 19 x 8.5 front 19 x 9.5 rears and run 235/35/19 & 275/30/19 with no problem..... I want to lower it though the rear still looks a little high.... front is better but could be lowered as well a little bit...
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