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      08-11-2012, 07:06 AM   #1
savian
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question about 328i ' s tires

the original tires on 328i sportline is 225/45/R18, Anyone can tell whether it will silp when drive in sport mode?
What's the most balance tire size for 328i? Front 225 back:245?
thanks!

Last edited by savian; 08-11-2012 at 08:10 AM..
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      08-11-2012, 08:07 AM   #2
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Any tire will slip if you drive fast enough, regardless of whether in sport, comfort or ecopro. I am not sure exactly what you're asking...

The best tire size for what? For daily driving? Road course? Drag racing?
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      08-11-2012, 08:11 AM   #3
savian
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Quote:
Originally Posted by mocohead View Post
Any tire will slip if you drive fast enough, regardless of whether in sport, comfort or ecopro. I am not sure exactly what you're asking...

The best tire size for what? For daily driving? Road course? Drag racing?
thank you,sorry for my bad english~~~
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      08-11-2012, 07:12 PM   #4
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It is ok...I am trying to help. How do you plan to use the car?
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      08-11-2012, 09:34 PM   #5
savian
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Quote:
Originally Posted by mocohead View Post
It is ok...I am trying to help. How do you plan to use the car?
For daily driving, occasionally drag racing...
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      08-12-2012, 05:46 AM   #6
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I am having a problem answering this question of square vs staggered setup for a 328i. Here are a few quotes I took from some reviews.


http://www.roadandtrack.com/tests/co...i_sedan_page_3


"In our track testing, finding the limits was a far more natural process, aided by a touch more body roll and a “square” tire setup (225/45-18 Goodyears all around, versus the C250’s staggered 225/255 fitment). Less tread width out back allowed for working the BMW’s tail a bit more, drawing you further into the driving experience without compromising grip or unduly impairing stability, as attested by slalom and skidpad times nearly identical to those of the Mercedes. But the wheel/tire package doesn’t look as cool."


http://www.bmwblog.com/2012/02/05/bm...mw-335i-sport/


"Surprisingly, the 19-inch run flats felt very grippy and even with DCT off and a happy right foot. The BMW Style 401 wheels with 19 inch 225/40 R19, 19×8.5, 255/35 R19 optional tire setup for an additional $900 are worth the extra cost on the Sport Line. They will help to visually set the 335i Sport Line apart from the base 328i Sport Line and seem to hold the tarmac with a death grip compared to the non-staggered 18 inch standard wheel setup which had a tendency to relinquish it’s hold of the road well before the 19’s."


http://www.e90post.com/forums/showthread.php?t=697351

square vs staggered discussion link from E90 forum.


Staggered wheels will promote more understeer and I prefer a neutral handling car to more aggressive looking, so I am leaning to a square setup. What further frustrates me is that if you choose a square setup with the M Sport package apparently you are forced to take all season tires? I don't understand why because I can get performance tires with same size wheels, square setup on the Sport Line.
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      08-12-2012, 10:47 PM   #7
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Quote:
Originally Posted by E34 View Post
I am having a problem answering this question of square vs staggered setup for a 328i. Here are a few quotes I took from some reviews.


http://www.roadandtrack.com/tests/co...i_sedan_page_3


"In our track testing, finding the limits was a far more natural process, aided by a touch more body roll and a “square” tire setup (225/45-18 Goodyears all around, versus the C250’s staggered 225/255 fitment). Less tread width out back allowed for working the BMW’s tail a bit more, drawing you further into the driving experience without compromising grip or unduly impairing stability, as attested by slalom and skidpad times nearly identical to those of the Mercedes. But the wheel/tire package doesn’t look as cool."


http://www.bmwblog.com/2012/02/05/bm...mw-335i-sport/


"Surprisingly, the 19-inch run flats felt very grippy and even with DCT off and a happy right foot. The BMW Style 401 wheels with 19 inch 225/40 R19, 19×8.5, 255/35 R19 optional tire setup for an additional $900 are worth the extra cost on the Sport Line. They will help to visually set the 335i Sport Line apart from the base 328i Sport Line and seem to hold the tarmac with a death grip compared to the non-staggered 18 inch standard wheel setup which had a tendency to relinquish it’s hold of the road well before the 19’s."


http://www.e90post.com/forums/showthread.php?t=697351

square vs staggered discussion link from E90 forum.


Staggered wheels will promote more understeer and I prefer a neutral handling car to more aggressive looking, so I am leaning to a square setup. What further frustrates me is that if you choose a square setup with the M Sport package apparently you are forced to take all season tires? I don't understand why because I can get performance tires with same size wheels, square setup on the Sport Line.
The understeer that staggered tires get a rap for is greatly exaggerated imo.
That is something that may come in to play at the track. For daily driving I didn't notice anything like under steer in any of the 3 I drove.
The last 3 I tested was a 335i sport with the 19's. The only actual difference I found for day to day driving is that you can feel cracks and bumps in the road more so with the 19's due to their shorter sidewall.

The bigger consideration is the type of tire your 3 will get.
Nearly all sport lines with 18" square setup get Goodyear touring tires.
Touring tires are designed for better comfort, lower noise.
Performance tires are designed for better grip, and thus wear quicker.

I would have gone with the all seasons in my Msport except for the fact that I know the all season's BMW would put on it would be lack luster.
So, I went with the standard 18" staggered summer performance tires.
When I get my car in a couple weeks, then I'll know if BMW actually puts on real summer performance tires on the Msport, instead of the summer touring tires that are on most sport lines.

For me though it won't matter too much as I will be getting a set of ultra high performance all seasons in the staggered 18" size, to fit the Msport wheels. That's what I have on my 135i and I love the setup.
I'm running Conti DWS on the 135i.
For my Msport I will get either the Conti's or the new Bridgestone RE970
UHP all seasons. The Bridgestones have been tested by Tirerack to have better turn in response and quicker transitional handling compared to the Conti's. But, the Conti's are rated better in wet and snow.
Tough call. I'm leaning towards the Conti's for the better wet and snow performance.
They've worked great in my 135i for the past 3yrs with great rides and quiet too, compared to the summer performance RFT's that came stock.
The AS feel just as good in summer performance and still get me through the winter, all the while with a better ride.

I'll now more once I get my Msport with the summer perf RFT's.
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      08-13-2012, 10:37 PM   #8
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The 328i already has massive understeer even if you pull all of the rear toe out with 225's square, I couldn't imagine trying this car staggered.

My stock goodyear efficientgrip runflats on a sportline do not spin without traction control, the car doesn't have enough power.
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      01-25-2019, 01:57 AM   #9
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Quote:
Originally Posted by brian99997 View Post
The 328i already has massive understeer even if you pull all of the rear toe out with 225's square, I couldn't imagine trying this car staggered.

My stock goodyear efficientgrip runflats on a sportline do not spin without traction control, the car doesn't have enough power.
Sorry for the thread revival, but the more I learn the dynamics of the car, the more I'm upset they'd neuter somewhat neutral balance for looks (msport staggered setup), particularly on the 328i which needs every single pony flat out to even get a smidge of rear end rotation on corner exit.

I'm seriously debating switching out my rears for 225's on the stock msport rear wheels. Has anyone done this and noticed an effect?

OTOH I've got a lead on some 437m's for cheap, debating pulling the trigger on those, even though they are more likely to be a heavier setup and 10mm wider tires front\back.
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      01-26-2019, 09:38 AM   #10
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Stretching 225 on the 8.5 rear would cause a neutral balance however, except as winter tires, I feel 225 is too narrow for f3/4 series cars.

I'd keep the 255 on the 8.5" rear and swap the 225 to a 245/40/18 (245/35/19 if 19s) up front instead.

Although 437 look superb you're back to understeer. reducing the rear tire size to 265/35/19 will help that.

Last edited by alohasurftoad; 01-26-2019 at 11:21 AM..
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      01-26-2019, 11:09 AM   #11
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Quote:
Originally Posted by alohasurftoad View Post
Stretching 225 on the 8.5 rear would cause a neutral balance however except as winter tires, I feel 225 is too narrow for f3/4 series cars.

I'd keep the 255 on the 8.5" rear and swap the 225 to a 245/40/18 (245/35/19 if 19s) up front instead.

Although 437 look superb you're back to understeer. reducing the rear tire size to 265/35/19 will help that.
Its m2 tire setup on the 437, so 245 fronts and 265 rears, i considered it because the fronts will gain 10mm on the rears compared to my current 225/255’s setup.
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      01-26-2019, 11:25 AM   #12
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Quote:
Originally Posted by RMachuca3d View Post
Its m2 tire setup on the 437, so 245 fronts and 265 rears, i considered it because the fronts will gain 10mm on the rears compared to my current 225/255’s setup.
yes, 245/265(M2) would handle better than 225/255(F3/4)
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      01-29-2019, 09:37 AM   #13
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Quote:
Originally Posted by alohasurftoad View Post
Stretching 225 on the 8.5 rear would cause a neutral balance however, except as winter tires, I feel 225 is too narrow for f3/4 series cars.

I'd keep the 255 on the 8.5" rear and swap the 225 to a 245/40/18 (245/35/19 if 19s) up front instead.

Although 437 look superb you're back to understeer. reducing the rear tire size to 265/35/19 will help that.
2015 F30 335i M Sport running stock 403M :

225/40r19
255/35r19

Are you saying I can install tires sized 245/35r19 on my stock front 403M rims? I've been entertaining the idea of going square: https://f30.bimmerpost.com/forums/sh....php?t=1578148
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      01-29-2019, 10:18 AM   #14
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(not my car) but this the size upgrade from 225/40/19 to 245/35/19 up front on 442M, which is the same spec as your 403M. 245/35/19 is the max width on 8" oem fronts. the rear tires are 255/35/19 which is the max width on 8.5"

fixed a typo 255 is max on 8.5" rear
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Last edited by alohasurftoad; 01-29-2019 at 10:31 AM..
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      01-29-2019, 10:28 AM   #15
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Quote:
Originally Posted by alohasurftoad View Post
(not my car) but this the size upgrade from 225/40/19 to 245/35/19 up front on 442M, which is the same spec as your 403M. 245/35/19 is the max width on 8" oem fronts. the rear tires are 225/35/19 which is the max width on 8.5"
Is that a typo on the rear size max width?
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      01-29-2019, 10:30 AM   #16
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Quote:
Originally Posted by ctbear View Post
Is that a typo on the rear size max width?
oh sorry, typo. 255/35/19 is the max on 8.5" rear. thx for catching it.
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      01-29-2019, 11:18 AM   #17
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Quote:
Originally Posted by alohasurftoad View Post
oh sorry, typo. 255/35/19 is the max on 8.5" rear. thx for catching it.
Thanks for the good info!
Kinda interesting that BMW didn't use the max sized tire for the fronts as they did for the rear. As is stock, there is more of a tendency for understeer right. So, if I went max size up front that would surely help with that...maybe slightly
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      01-29-2019, 11:36 AM   #18
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Quote:
Originally Posted by ctbear View Post
Thanks for the good info!
Kinda interesting that BMW didn't use the max sized tire for the fronts as they did for the rear. As is stock, there is more of a tendency for understeer right. So, if I went max size up front that would surely help with that...maybe slightly
i run 245/255 on my aftermarket 18's and it helps with understeer immensely. it is evident how much more "push" the car has when i swap back to my oem 441M with 225/255 every so often.
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