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05-27-2010, 11:53 AM | #45 | |
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The OE size should be 225/45-18 and 255/40-18 But the ones you're looking at will most likely be my choice as well. They will reduce your diameter by ~0.6" from OE spec. I think thats fine as long as you do both front & rear. (should keep DSC happy) Also, a benefit is a minor total gearing advantage. Negative is that the car will record a few extra miles on the ODO & speedo will read slightly faster.
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05-27-2010, 12:46 PM | #46 |
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I have a 2004 Z4 3.0i with 18x8.5 square at a 30mm offset with 255/35-18 tires all around. The front is close, but there is no rubbing. The rear has plenty of space. Just make sure your offsets are ok, and you should be fine -up to about a 10" rear wheel. You could also just run the wider rear tires on a 9" wheel since 10" should not net you much, if any, performance advantage with only a 265 rear tire. I would go with a 9" rear wheel or perhaps 9.5" rear wheel, or even skate by with 8.5" square.
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05-27-2010, 01:44 PM | #47 | |
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05-27-2010, 01:46 PM | #48 |
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^ thanks... wasn't sure where the ODO picked up it's source.
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05-27-2010, 03:12 PM | #49 | |
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05-27-2010, 03:16 PM | #50 |
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Actually, inTgr8r is right. The odometer will record a few extra miles when reducing the tire diameters.
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05-27-2010, 03:37 PM | #51 |
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05-27-2010, 05:04 PM | #52 | |
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By how much you think? I dont want to rack up false miles!
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05-27-2010, 05:34 PM | #53 |
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For every 1000 miles you will rack up 1027 miles.
Data sheet
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05-27-2010, 07:36 PM | #54 | |
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could also save ourselves some worries about hydroplaning with a little smaller tire
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05-27-2010, 08:00 PM | #55 |
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With my 245/40 275/35 set up on Nitto Invos I was surprised the sidewall actually ended up being taller than the stock 45/40 set up. I ran into a similar issue on my M3 between Advan Neovas and Hoosier A6s both identical size but the Hoosiers being taller. That is typical from my experience with race rubber though. So between brands you may find that the side-walls vary slightly.
Depending on the tire you might get a little pooch effect but unless it is substantial, you are really one with your car or driving competitively and keeping a data log you probably wont notice if the diameter is slightly off. If your time/budget allows it is fun hit the track or auto-x to experiment with tires to see how they effect your car. Last edited by GothM; 05-28-2010 at 01:47 AM.. |
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