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The Tire Rack's Tire & Wheel Forum
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Old 03-16-2013, 11:58 AM   #1
jwils323i
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VMR VB3's 18" staggered

Getting VMR VB3's. 18x8.5 (ET 40) up front and 18x9.5 rear (ET 45). Have a 1999 323i and plan on installing Eibach Pro Kit springs this summer. What are good tire sizes? I've heard that 225/40/18 and 255/35/18 works. How would this look?

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Old 03-16-2013, 08:34 PM   #2
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Old 03-16-2013, 08:38 PM   #3
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I have them 225/40/18 and 255/35/18. But my rims are 18x8 et47 front and 18x8.5 et50 rear. I think the tires are prefect for my rims but if you had a 9.5 it would need to be wider in my opinion.
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Old 03-18-2013, 01:30 PM   #4
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225/40/18 and 255/35/18 will work just fine. You can even use a 235/40/18 up front.
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Old 03-18-2013, 02:17 PM   #5
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thanks Kevin
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Old 03-18-2013, 03:54 PM   #6
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It will work, however I prefer my tires to look right. As in not angled in with the rim sticking way out. The proper tire width for a 9.5" would be more like 285. my 2 cents.
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Old 03-18-2013, 05:24 PM   #7
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Quote:
Originally Posted by Imanewbie View Post
It will work, however I prefer my tires to look right. As in not angled in with the rim sticking way out. The proper tire width for a 9.5" would be more like 285. my 2 cents.
There are many acceptable width ranges for wheels and tires, however that width of tire is not really ideal for the car when taking into account the clearance of the fenders. Different tires will also fit on the wheel differently, even if the size is the same.
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Old 03-19-2013, 12:30 AM   #8
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I agree, with a 9.5' rim and an offset of 45 is pushing it. I would be worried it will hit the shock. I would go for an et of 20's for the rear, It would look much better and at worst you would have to roll the fenders. I can't even for my finger between the tire and strut/shock with mine.
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Old 03-19-2013, 10:36 AM   #9
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The 9.5 et.45 is actually the ideal fitment for the rear of an E46 Non-M car. The 20 offset is too aggressive and is a fitment designed more for the M3. Here are a few shots from customers with the same VMR VB3 Wheels in 18x8.5 et.40 and 18x9.5 et.45 set ups on the car. Good luck and let me know if you need any help!





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Old 03-19-2013, 11:28 AM   #10
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Quote:
Originally Posted by ModBargains View Post
The 9.5 et.45 is actually the ideal fitment for the rear of an E46 Non-M car. The 20 offset is too aggressive and is a fitment designed more for the M3.
+1

9.5 ET20 on a non-M = fender modification and stretched tires. Unless you're planning to do custom widebody work, ET45 is the most ideal fitment for the rear, with a 255-265 tire.
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Old 03-19-2013, 01:25 PM   #11
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There is acceptable and there is right, we are talking about two different things here. Go big or keep you stock wheels on. If your not going to modify anything then get 8.5 width with 255/35 like the factory did so it don't look so silly with your rim sticking way out.
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Old 03-19-2013, 01:27 PM   #12
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Old 03-19-2013, 01:29 PM   #13
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There's nothing wrong with running narrower tires than a 285 on those widths haha. The "right" size would be anything that doesn't throw off your speedometer and doesn't rub on your fenders.
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Old 03-30-2013, 10:26 AM   #14
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I really like 255/35/18 tires on the back but I don't like the price. If I wanted to go with a smaller width would a 245/40/18 in back and a 225/40/18 work in front. I'm worried about throwing the dsc off. From what I figured a 235/40 is closer obviously but don't really know how much I can go before the car don't like it. Any advice would be much appreciated.
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Old 04-01-2013, 01:29 AM   #15
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225/40/18 and 255/35/18 will work just fine. You can even use a 235/40/18 up front.
Does a 225/40 have the same tread circumference as a 235/40?
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Old 04-01-2013, 06:46 AM   #16
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Any1 selling there rims???
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Old 04-01-2013, 06:46 AM   #17
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Originally Posted by ModBargains View Post
The 9.5 et.45 is actually the ideal fitment for the rear of an E46 Non-M car. The 20 offset is too aggressive and is a fitment designed more for the M3. Here are a few shots from customers with the same VMR VB3 Wheels in 18x8.5 et.40 and 18x9.5 et.45 set ups on the car. Good luck and let me know if you need any help!





Yo are you selling those rims
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Old 04-01-2013, 09:07 AM   #18
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ModBargains sells VMR wheels, yes.
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Old 04-01-2013, 09:15 AM   #19
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225/40/18 and 255/35/18 will work just fine. You can even use a 235/40/18 up front.
OK, I thought I'd find a tire-circumference calculator and figure this out. For these two tire sizes, the tire diameter differs by a good 1/3 of an inch, and the rolling circumference differs by approximately one full inch.

So, how does this affect speedometer/odometer readings, and how does it affect DSC? How much tolerance is there in the DSC before different tire diameters throw the system off?
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Old 04-01-2013, 12:23 PM   #20
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Quote:
Originally Posted by terzinator View Post
Does a 225/40 have the same tread circumference as a 235/40?
225/40 and 235/40 tires are not the same height.
Quote:
Originally Posted by terzinator View Post
OK, I thought I'd find a tire-circumference calculator and figure this out. For these two tire sizes, the tire diameter differs by a good 1/3 of an inch, and the rolling circumference differs by approximately one full inch.

So, how does this affect speedometer/odometer readings, and how does it affect DSC? How much tolerance is there in the DSC before different tire diameters throw the system off?
Ideally you should have the height of the tires be as close to each other as possible. If you are running a staggered fitment you would want 225/255 tires, or 235/265 tires in your case.

Your speedo and odometer won't be affected a ton since both tire sizes are within spec for your car though, but if you're thinking about buying two of one and two of the other, just get a square wheel and tire fitment. You will be able to rotate your tires and whatnot that way.
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