Difference between square (Flat) and staggered (Perf summer) factory setups for m235i

ElMeleegy · 08-30-2021, 01:41 PM

I am eyeing a used m235i with squared factory setup. when I was test driving it I noticed a lot of slip at the rear when pressing harder on the gas.

I apologize upfront if that is a repeated questions but I've done a lot of searching and couldn't find the answers for all of them. I am very inexperienced when it comes to changing the tire size.

I was wondering

- How easy it is to switch to factory staggered setup?
Is it just matter of getting 8 inch width wheels and tires and replacing it, or do I need to put in spacers or do any adjustments in the axle.

- When I compared the two tires 225/40r18 vs. 245/30r18 there is about 0.3" difference in height, does this mean that factory squared cars will run a bit higher than factory staggered at the rear. or does BMW do any tuning in suspension to make them consistent?

- Finally, for people who run performance summer tires that are not run flat, do you carry a spare with you? What is the size of the spare and does it work for front and rear?

Thanks a lot for spending time reading this

Ajowhan · 09-07-2021, 09:46 AM

I am inexperienced too but here is what I think I know.

If you are switching to factory staggered setup and stay with 245 width tire, you do not need to do any additional adjustments.

On the factory staggered, the rear is 245/35r18 instead of the 245/30r18. I think this is a typo on your end as 225/40r18 to 245/35r18 does have about 0.3" difference in height. With that said, 0.3" difference is slightly over 1% and thus shouldn't present any issue.

As far as spare goes, can't go wrong with

https://modernspare.com/product/2013...e-kit-options/

Me personally, I just carry a triple A membership and pray before I drive everyday that I dont catch a nail.

Cheers, hope that helps.

08-30-2021, 01:41 PM	#1
ElMeleegy New Member 0 Rep 5 Posts Drives: BMW M235i Join Date: Aug 2021 Location: California iTrader: (0)	Difference between square (Flat) and staggered (Perf summer) factory setups for m235i I am eyeing a used m235i with squared factory setup. when I was test driving it I noticed a lot of slip at the rear when pressing harder on the gas. I apologize upfront if that is a repeated questions but I've done a lot of searching and couldn't find the answers for all of them. I am very inexperienced when it comes to changing the tire size. I was wondering - How easy it is to switch to factory staggered setup? Is it just matter of getting 8 inch width wheels and tires and replacing it, or do I need to put in spacers or do any adjustments in the axle. - When I compared the two tires 225/40r18 vs. 245/30r18 there is about 0.3" difference in height, does this mean that factory squared cars will run a bit higher than factory staggered at the rear. or does BMW do any tuning in suspension to make them consistent? - Finally, for people who run performance summer tires that are not run flat, do you carry a spare with you? What is the size of the spare and does it work for front and rear? Thanks a lot for spending time reading this
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09-07-2021, 09:46 AM	#2
Ajowhan Lieutenant 256 Rep 515 Posts Drives: m240i 'vert Join Date: Feb 2021 Location: CA iTrader: (1)	I am inexperienced too but here is what I think I know. If you are switching to factory staggered setup and stay with 245 width tire, you do not need to do any additional adjustments. On the factory staggered, the rear is 245/35r18 instead of the 245/30r18. I think this is a typo on your end as 225/40r18 to 245/35r18 does have about 0.3" difference in height. With that said, 0.3" difference is slightly over 1% and thus shouldn't present any issue. As far as spare goes, can't go wrong with https://modernspare.com/product/2013...e-kit-options/ Me personally, I just carry a triple A membership and pray before I drive everyday that I dont catch a nail. Cheers, hope that helps.
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