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XI Staggered Tire Calculation Tables


03142015, 01:31 AM  #45  
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03202015, 04:30 AM  #46 
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Hi guys,
I am also having a staggered setup 8J on 8.5J 17" M sport package on the xi. I was wondering will : 225/45/17 and 245/40/17 will damage the X ,yes i saw the calculations and the difference is 1.02%  has anyone runned this kind of setup or if anyone is aware if it can cause issues with the car. Unfortunately the 255/40/17 is a rare size and there is almost no option to choose from. This tyre issue is the only bad side of the X so far and I am really not happy with that,i guess the only option if 245 cant do the job is 4x225's. Thanks 
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03272015, 10:01 PM  #47 
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Hi guys. I am completely lost with staggered calculations. I am looking at a set of wheels size:
18x8.5 et35 front 18x9.5 et40 rear Will this work on a 2008 328xi? Thanks in advance.
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04232015, 10:12 PM  #49  
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04252015, 11:23 AM  #50 
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Glad a lot of people like my thread,
Some comments  245 and 255 have been done on the front so I included them, exact figment is required.  Offset doesn't matter, width makes a marginal difference, I wouldn't worry about it.  From my experience I recommend the stock stagger (in blue on table).
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06112015, 10:53 AM  #52 
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I want to do a square setup. 19x8.5 wheels with 235/3519 tires. This is acceptable for xdrive, correct?

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06112015, 06:37 PM  #53  
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06172015, 03:58 PM  #54 
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After days of deciding on a decent rim... now this..
I'm ecstatic this thread is alive and exist thank you!
im looking to buy rims for 2007 328xi sedan: 18x8.5 18x9.5 both et 35 offset now i know u said offset doesn't matter and width either but i dont want a huge bubble sidewall for a tire size, nor potholes bending my rims on the first bump in the road is my biggest fear. im new to this wheel purchasing and i know the xi awd comes into play when the tires arent all the same so basically. im assuming if i buy a setup of 225/40 or 235/40 ALL around it wont stretch the tire in the back? will the circumference be the same? please recommend a tire size idk what to look for. square setup beneficial for cornering, and great traction? 
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06172015, 04:02 PM  #55 
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06182015, 08:42 PM  #56 
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My daily drive is terrifying which is why I haven't gone 19 yet.

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06252015, 11:00 AM  #58 
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same size tire but different width wheel?
I have a lci 328 xi. and i put 235/35/19 on a 19x8.5 and a 19x9 . The tire brands are differen't front and back but the tread depth is the same. No lights or codes have been triggered. Say that this would pretty okay to just leave as is for now?

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07092015, 02:32 PM  #59 
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Bump.
Can we figure out 20's? Something like 235/xx and 265/xx or 245/xx to 275/xx 
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08252015, 09:22 AM  #60 
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Sorry to bump an "older" thread, but what is the max variance that is allowed for revs per mile front to rear? I feel as previously stated, that comparing actual manufacturers specs is the best way to determine the front to rear variance on a staggered set up. For example, the 2 sets of tires in 2 different sizes I'm looking at have a small variance in revs per mile (set 1FR 813, RR818, and set 2FR 800, RR 805). In this case there is a 5 rev per mile difference from front to rear. What is the maximum allowance to SAFELY run on our Xdrive?

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09042015, 07:24 PM  #61  
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If you look the factory 19" option has a 5 rev/mile difference, make your own decision.
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09042015, 07:27 PM  #62 
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19's suck for DD, just not enough sidewall
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09152015, 03:14 PM  #65  
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If only the tire size matters and not the wheel width, then why would someone want to put tires with different aspect ratios on the front and rear? Does this number have to change based on tire width?
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09152015, 03:38 PM  #66 
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Yes. The aspect ratio (sidewall height) is a percentage of the width of the tread. So a 225/50 means the sidewall is 112.5mm tall. A 225/40 means the sidewall is 90mm tall. That means the rolling circumference between the two tires are different. The object is to get the sidewall height to be as close to identical as possible. The wider the tire, the lower the aspect ratio (sidewall height) has to be. The closer the sidewall height front to rear, the closer the number of times the tire will makes a full revolution within 1 mile.

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