Wheel circumference difference threshold for AWD

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Aug 16, 2012 | 08:10 PM

tekkie

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From: Toronto, Canada

Wheel circumference difference threshold for AWD

I know for AWD, I should try to get the wheel circumference between the front and back as close as possibile in a staggered set up. What is the threshold difference (percent) I should try to stay under to avoid any issues? Thanks.

Aug 17, 2012 | 05:43 AM

Simmsled

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Joined: Jun 2012

Posts: 657

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From: Indiana

Not sure, but I'll add my setup for reference...

IS-F wheels

front: 19x8 with 225/40 19
rear: 19x9 with 255/35 19
tires: Continental DW
No issues. Rides/handles great!

.......FRONT........REAR.........
Diameter 662.6mm 661.1mm
Circumference 2081.6mm 2076.9mm
Poke 56.6mm 59.3mm
Speedo error 0% 0.23%
Reading at 30mph 30mph 30.07mph
Reading at 60mph 60mph 60.14mph
Ride height gain 0mm -0.75mm
Arch gap loss 0mm -0.75mm

www.willtheyfit.com

Aug 17, 2012 | 05:53 AM

IXI187IXI

Lexus Fanatic

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From: Philly

I believe its 2%

Aug 17, 2012 | 09:35 AM

ADPearl3GS

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Joined: Apr 2012

Posts: 71

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From: WA

I heard 1% but I could be wrong, I am currently working on my set up as well and figured out a nice set up under 1%. Use the link above for willtheyfit.com should be all you need!!

Aug 17, 2012 | 11:16 AM

sexylexygs

Driver School Candidate

Joined: Jun 2012

Posts: 10

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From: ca

it under 3%. for 19in wheel. the best fit is 235-35-19 front 275-30-19 this will be 1.40% Why i said the best is because lots of brand name make this sized tire even cheap brand sell for 90 a tire. 225/40/19 only a couple company make them,is ****ing too much money. and 245/35/19 and 285/30/19 will be great at .38% but too ****ing wide. i have a set of 19in H.R.E and it took me 3 months to understand this ****! its ok to be 3% because it not all time awd. its 70% rear and 30% front. look at the spare tire it come with, a lot smaller right?

Last edited by sexylexygs; Aug 17, 2012 at 11:20 AM.

Aug 17, 2012 | 11:28 AM

sexylexygs

Driver School Candidate

Joined: Jun 2012

Posts: 10

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From: ca

and 225/40/19 is .89% 255/35/19 is .66% which is very close to stock % but the two sized itself is to fall apart at .89%- .66% is .23%. 235/35/19 is 1.48% 275/30/19 is 1.40% it .08% apart. we have to worry getting close to stock size and the 2 tire cant be to fall apart. this is crazy

Aug 17, 2012 | 06:13 PM

tekkie

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Joined: Oct 2002

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From: Toronto, Canada

Quote:

Originally Posted by sexylexygs

Quote:

Originally Posted by sexylexygs

Thanks so much for this great information. This is the information I was after as I am in the process of choosing my 19" wheels, but was not sure whether to go with the safe route (square set) or staggered.