06-25-2013, 02:19 PM | #1 |
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275 width in the rear?
has anyone tried 275/35/18 or 275/30/19's on the rear yet? I'm looking into ordering aftermarket 18" or 19" wheels - still haven't decided. Most I'm looking at are 9.5" wide on the rear with a 35 offset. If a 255 width fits without much trouble, would the extra 20mm (.78 inches) cause any issues in the rear? BTW, I would be sticking with 225 or 235 in the front either way. Thanks in advance...
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06-25-2013, 07:43 PM | #2 |
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I probably wouldn't go that wide in the rear. Although it would definitely look cool, all you will do is cause the vehicle to understeer more, and you definitely want to confirm that the O.D. of whatever front tires you pick match up exactly with the rear , or you risk causing issues with the AWD and ABS due to wheel speed differences.
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06-26-2013, 06:55 PM | #4 |
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265/35 is closer to spec, its within 1.1% of OEM spec.
285/30 is also better than the 275/35 but might be a tad wide for the fenders. It's also around 1% of spec. I wouldn't recommend the 275/35 as it is going to screw with your X-drive system being over 2% out of spec. |
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06-26-2013, 09:43 PM | #6 | |
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Quote:
Front/Rear 225/35/19 255/30/19 25 in diameter 225/45/18 255/40/18 26 in diameter
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06-27-2013, 07:09 AM | #7 | |
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These are percentages based off your OEM spec tire sizes and if you want your X-Drive to work properly, you are going to need to keep within 1% |
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06-27-2013, 11:30 AM | #8 |
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Oh, Ok, I'd always thought the most important number to stay closest to was the overall diameter and that's 26" for the standard 18" wheels on the 35i....but the upgraded 19" package you can order with the msport line converts to something like 25.1" which is a pretty big difference (approx. 4%)in my eyes.
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06-29-2013, 02:05 PM | #9 |
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I wouldnt be too concerned about a slight increase or decrease in diameter as long as the front and rear still match perfectly. You can find the O.D. for various sizes/manufacturers on tirerack.com. Our tires in the factory size are EXACTLY the same diameter, so that is the way I would keep it. Even ABS braking performance will be affected by mismatching diameters.
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06-30-2013, 09:00 PM | #10 |
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looks like 245/35/19 fronts and 285/30/19 rears at 25.8" diameter should fit the bill...
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07-05-2013, 02:16 PM | #11 | |
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07-05-2013, 02:43 PM | #12 |
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ONLY the Conti DW's (out of 10 different max summer tires on tire rack) in 225/45/18 - 255/40/18 have the exact same diameter - 26.0 inches. So does 0.1 of an inch matter that much from front to back if it measures 25.9 inches? The other 9 out of the 10 tires do not match exactly.....
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07-06-2013, 08:43 PM | #13 |
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The reason for the slight difference in outer O.D. is the tread depth.
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07-06-2013, 09:50 PM | #14 |
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I thought so too, however, I believe all 10 tires I researched were listed as 10/32" tread depth....
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