IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

New wheels - "Check AWD System" alert

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Old Aug 27, 2014 | 02:01 AM
  #31  
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Forum429 what are you talking about? Why would you compare a front 20 inch wheel to an 18 in rear wheel? Changing to the 35 aspect ratio will most likely fix the problem.
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Old Aug 27, 2014 | 05:15 PM
  #32  
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Originally Posted by Kuz
Ordering the 225-35's today. Thanks for your insight everyone!
Kuz, did you purchase yet?

Are any other members running 35 series tires on a 20" wheel? I wanna see how it looks up front. How much, if any, would this restrict ride height? I planned on dropping my front end significantly to sit on top of the 30 series tires. Hoping the taller sidewall doesnt affect anything TOO much.
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Old Aug 27, 2014 | 08:58 PM
  #33  
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Originally Posted by jbkhat303
Forum429 what are you talking about? Why would you compare a front 20 inch wheel to an 18 in rear wheel? Changing to the 35 aspect ratio will most likely fix the problem.
Why would it matter if it's front or rear, 20 or 18"?
Its still need the same overall diameter of 25 inch regardless to have the correct reading.
If using both rear wheels would be easier for you people to understand then sure I will post it.
255/35R18 overall diameter 25.03"
255/30R20 overall diameter is 26.02
Still 1" bigger and 3.98% difference.
Similar size difference if I use 225/40R18 front wheel for comparing.
Do the f-ing math.
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Old Aug 27, 2014 | 09:26 PM
  #34  
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Originally Posted by forum429
Why would it matter if it's front or rear, 20 or 18"? Its still need the same overall diameter of 25 inch regardless to have the correct reading. If using both rear wheels would be easier for you people to understand then sure I will post it. 255/35R18 overall diameter 25.03" 255/30R20 overall diameter is 26.02 Still 1" bigger and 3.98% difference. Similar size difference if I use 225/40R18 front wheel for comparing. Do the f-ing math.
lmao thank you
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Old Sep 3, 2014 | 09:57 AM
  #35  
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Originally Posted by DoomBuggy
Kuz, did you purchase yet?

Are any other members running 35 series tires on a 20" wheel? I wanna see how it looks up front. How much, if any, would this restrict ride height? I planned on dropping my front end significantly to sit on top of the 30 series tires. Hoping the taller sidewall doesnt affect anything TOO much.
They are arriving today and going on tomorrow for a test.
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Old Sep 3, 2014 | 05:22 PM
  #36  
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Originally Posted by Kuz
They are arriving today and going on tomorrow for a test.
Cant wait to see photos! I just got my refund back from TireRack for the incorrect set.
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Old Sep 4, 2014 | 09:43 PM
  #37  
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The op has 20 inch wheels front and back. No one is telling him to use 35 ar on his 18 inch Front wheels. We're saying to use a 35ar on his 20 in wheel. Having the overall 26in diameter will only affect his mph reading, which will be off, but it will not give him the error that he's getting.
Switching to the 35ar front tire will give him overall diameter of 26.2 front and 26.02 rear. Well within tolerance to prevent the message he's getting.

Originally Posted by forum429
Why would it matter if it's front or rear, 20 or 18"?
Its still need the same overall diameter of 25 inch regardless to have the correct reading.
If using both rear wheels would be easier for you people to understand then sure I will post it.
255/35R18 overall diameter 25.03"
255/30R20 overall diameter is 26.02
Still 1" bigger and 3.98% difference.
Similar size difference if I use 225/40R18 front wheel for comparing.
Do the f-ing math.

Last edited by jbkhat303; Sep 4, 2014 at 09:58 PM.
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Old Sep 4, 2014 | 10:33 PM
  #38  
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Originally Posted by jbkhat303
The op has 20 inch wheels front and back. No one is telling him to use 35 ar on his 18 inch Front wheels. We're saying to use a 35ar on his 20 in wheel. Having the overall 26in diameter will only affect his mph reading, which will be off, but it will not give him the error that he's getting.
Switching to the 35ar front tire will give him overall diameter of 26.2 front and 26.02 rear. Well within tolerance to prevent the message he's getting.
Lets put it in a simple conclusion.
Do you think 225/45R18F 255/40R18 is a correct size for the car?
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Old Sep 5, 2014 | 07:39 AM
  #39  
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225-35-20 FIXED THE PROBLEM.

Anyone running 20x9F 20x10R wheels on an AWD 3IS, 225-35-20F and 255-30-20 is the correct size.
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Old Sep 5, 2014 | 07:40 AM
  #40  
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Thanks for all of your input, especially those suggesting the proper solution!
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Old Sep 5, 2014 | 07:46 AM
  #41  
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Sorry for the crude photos. I'm at work and the forecast looks shi!!y. So she's a little dirty, but you get the idea.
Attached Thumbnails New wheels - "Check AWD System" alert-photo-1.jpg   New wheels - "Check AWD System" alert-photo-2.jpg  
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Old Sep 5, 2014 | 10:50 AM
  #42  
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Originally Posted by Kuz
Sorry for the crude photos. I'm at work and the forecast looks shi!!y. So she's a little dirty, but you get the idea.
Nice man!

Thanks for being the guinea pig for us AWD guys! Im happy to hear that fixed the problem.
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Old Sep 5, 2014 | 07:11 PM
  #43  
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Glad that worked for your kuz. The wheels look great
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Old Sep 6, 2014 | 11:33 AM
  #44  
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Thanks fellas!
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Old Sep 6, 2014 | 03:11 PM
  #45  
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Originally Posted by Kuz
Thanks for all of your input, especially those suggesting the proper solution!
Glad it worked out. Car looks fantastic!
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