[b-man]

The manual says 225/35 for front and 255/30 for rear, for 19s. But a lot of people say 235/35 for front, and 265/30 for rear. I've got a 09 328i xdrive. Anyone has 19s on theirs?

Or would you recommend sticking with different size wheels? Like 18s or 17s.

[giaolong]

How wide is Ur wheels...

[b-man]

Originally Posted by giaolong

How wide is Ur wheels...

Everything is stock right now, I believe they are 16x7

edit: 205/55-16, all 4

[giaolong]

I meant how wide is the wheels that u gonna get?

If its 19x8.5 and 9.5 then 225/35 and 255/30 for a narrow look.
Same wights but with 235/35 and 255/30 for a more square meaty look.

I'm running the first spec. Changing to 19x8.5 and 10 with 225/35 and 265/30 next week.

[azn_ignite]

235/35/19 and 275/30/19 are closer if you use a tire calulator

[phillip@bmpdesign]

Realistically, the benefit of running a wider wheel on the back of an all wheel drive vehicle is minimal at best. Staggered setup is used on rear wheel drive to give an added contact patch for grip on the drive wheels, in an xdrive setup you have almost twice as much contact patch for acceleration grip. If you are going for stance, you are better off with spacers since you will:

-spend less on tires
-run more all season type tires
-be able to rotate your tires if you have uneven wear patterns
-not have to worry about overall diameter differences

I'm not damning the practice, it just seems like a big investment and a lot of hassle for very little return. As Azn_ignite said, 275/30 and 235/35s are the closest setup, but between the sizes you listed 265s would match better than 255s.

[Nonecure]

Phillip, I agree with your opinion on the benefits of a staggered setup for a xi, but I didn't by a 335xi to be conservative.

I like the CSL style rims and would use my current stock wheels for winter. Are the 8.5” the widest you can put on the front? And 9.5 on the rear with the correct tire size and not modifying the car? If 8.5 are the largest I can realistically put on the front, having 9.5 on the back will still provide a little more traction; not so much on a straight line, but more in the corners. My old school mentality is more rubber is always better.

[b-man]

I haven't really decided on any tires or wheels. I'm afraid of slowing the car down. Wider tires will definitely slow the car down. So I may stick to 17s or 18s.

[Nonecure]

[QUOTE=baris;13354510 Wider tires will definitely slow the car down.[/QUOTE]

Wrong. Wider tires will always make you go faster around turns. If you talking about acceleration, then maybe if you increase the weight of your wheels.

[b-man]

I agree, wider tires will most likely be heavier. You can find wider tires that are lighter than your current setup, but narrow tires will weigh less as long as you're comparing same brands because there is less

Also I believe tires weight less than wheels, so do you think bigger wheels will also slow the car down?

[rattmobbins]

The amount of misinformation in this thread is making me

[b-man]

Originally Posted by rattmobbins

The amount of misinformation in this thread is making me

Well, everyone is stating their opinion. Enlighten us

[b-man]

Originally Posted by phillip@bmpdesign

Realistically, the benefit of running a wider wheel on the back of an all wheel drive vehicle is minimal at best. Staggered setup is used on rear wheel drive to give an added contact patch for grip on the drive wheels, in an xdrive setup you have almost twice as much contact patch for acceleration grip. If you are going for stance, you are better off with spacers since you will:

-spend less on tires
-run more all season type tires
-be able to rotate your tires if you have uneven wear patterns
-not have to worry about overall diameter differences

I'm not damning the practice, it just seems like a big investment and a lot of hassle for very little return. As Azn_ignite said, 275/30 and 235/35s are the closest setup, but between the sizes you listed 265s would match better than 255s.

Phillip, I agree with your suggestion on a non staggered setup. What size would you recommend? Like I said, my biggest concern is slowing the car down, and money

[phillip@bmpdesign]

I would go with the widest tire I was comfortable with and could get the best deal on. You will have the most selection with 235/35r19s if you wanted to stick with 19's which will look good, including a pretty decent selection of all season tires as well as performance summer tires. 18's are generally going to be cheaper and lighter and you will have a much bigger selection there as well (235/40r18s). I wouldn't go with anything smaller than 18's, but that may just be me.

Most of the xi's that we see and service in our shop also run spacers on the rear for the staggered look and the benefits of a wider track. It is also beneficial so that you can maintain that look when putting snow wheels and tires on.

[b-man]

I was thinking 225/40-18, since that's the oem tire size for 18s. Any benefit of using 235? Or is it just the looks?

Also, same size for front and rear?

[BmerMeUp]

Originally Posted by phillip@bmpdesign

Realistically, the benefit of running a wider wheel on the back of an all wheel drive vehicle is minimal at best. Staggered setup is used on rear wheel drive to give an added contact patch for grip on the drive wheels, in an xdrive setup you have almost twice as much contact patch for acceleration grip. If you are going for stance, you are better off with spacers since you will:

-spend less on tires
-run more all season type tires
-be able to rotate your tires if you have uneven wear patterns
-not have to worry about overall diameter differences

I'm not damning the practice, it just seems like a big investment and a lot of hassle for very little return. As Azn_ignite said, 275/30 and 235/35s are the closest setup, but between the sizes you listed 265s would match better than 255s.

I'm jumping in here a little late, but everything you say here Phillip makes 100% perfect sense and is exactly why I am still struggling after months of researching and my Springtime deadline is still quickly approaching with no wheels yet to show for it:

Square: Good for all the reasons you said. I am not interested in the "stance," square looks "clean," is a no-brainer, I drive an xi, so it all makes perfect sense.

but...

Staggered: All for looks. The #1 thing I can't get in square which I find extremely hot in staggered is the wheel - deeper lip or 'cave in the back vs. the front. I couldn't care less about stance, but the look in the wheel I find striking.

Still struggling big time with form over function on this. It's a tough one.

[Edtheted]

My OEM tyres are 225/50/18 I'm fancying fitting Michelin X climate tyres but they only make 235/50/18 would the wider tyre be allowed would it upset the handling of the X1?

[Gbk]

I see some posts about tires. I know these are old but I just put 245/45/17 (original size 224/45/17) on my 2010 bmw 323i and wondering how will it effect transmission and drivetrain?

[335insanity]

Originally Posted by Gbk

I see some posts about tires. I know these are old but I just put 245/45/17 (original size 224/45/17) on my 2010 bmw 323i and wondering how will it effect transmission and drivetrain?

this shouldn't affect the AWD at all as long as all of the tire sizes are the same there is never anything to worry about since the rolling diameter is the same. this is called a square setup if you didn't know unless you plan on running a staggered setup which is different sizes for front and rear then you would have something to worry about.

[rponti]

I have 19” with Conti 235/40/19. Right up from but jussssst clears. Fills wheel well nicely.