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Technical Topics Wheels and Tires Will going 235 front, 255 rear be a bad decision?

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      04-14-2020, 04:59 PM   #1
cigaro
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Will going 235 front, 255 rear be a bad decision?

Editing this post to ask a different question.

I will be purchasing Michelin Pilot Sport 4S tires to put on my factory staggered 19 inch wheels.

Basically I want to know if going to 235 /40 / 19 on the front while keeping the 255 / 35 / 19 in the rear will cause any issues. I want the fronts to look a little meaner and fill the wheel well a bit more.

I was considering a 235/265 setup but it seems from everything I have read that the 265 on the 8.5 inch wheel isnít the greatest idea. Any opinions on this with Michelin pilot sport 4s specifically? Concerns seem to be tire bulge, although Iím not sure how these tires are in that regard. The Bridgestones currently on already look a little bulgey with 255

Hopefully someone can weigh in on this.

Last edited by cigaro; 04-23-2020 at 04:00 PM..
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      04-15-2020, 02:27 PM   #2
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Max I've seen in the front from online research is 255 but the goldilocks zone seems to be in the 235/245 range

Largest rear tire width I've seen has been 295 but the quality zone seems to be in the 265/275 range

In regard to sidewall, it depends if you're leaving stock height or lowering since you will just be increasing the gap between your wheel and fender if you go decrease sidewall and don't lower the car.

Whether or not it's worth it is entirely up to you and how you're going to use the car - if you plan to daily drive it and that's it, might not be worth the added cost.
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      04-23-2020, 03:58 PM   #3
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Quote:
Originally Posted by NoTanks52 View Post
Max I've seen in the front from online research is 255 but the goldilocks zone seems to be in the 235/245 range

Largest rear tire width I've seen has been 295 but the quality zone seems to be in the 265/275 range

In regard to sidewall, it depends if you're leaving stock height or lowering since you will just be increasing the gap between your wheel and fender if you go decrease sidewall and don't lower the car.

Whether or not it's worth it is entirely up to you and how you're going to use the car - if you plan to daily drive it and that's it, might not be worth the added cost.
Thank you for the reply , I edited my original post to ask a different question. Maybe you have some thoughts
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      04-23-2020, 06:16 PM   #4
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There are people on the forum running 245/40r19 with 265/35r19 with no issues.
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      04-23-2020, 08:53 PM   #5
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Quote:
Originally Posted by Wyndi335I View Post
There are people on the forum running 245/40r19 with 265/35r19 with no issues.
I have seen that and I have seen others stating that 265 is too wide for an 8.5 and theres just so much conflicting information its killing me lol

I guess also the point youre making is there shouldnt be an issue with 235 and 255 correct?
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      04-23-2020, 09:31 PM   #6
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If its a xdrive 265 will be better. Less than 1% in diameter.
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      04-23-2020, 10:14 PM   #7
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Quote:
Originally Posted by Wyndi335I View Post
If its a xdrive 265 will be better. Less than 1% in diameter.
Its a RWD
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      04-30-2020, 02:37 PM   #8
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I'm a total newb, but I want a more aggressive square summer setup for my 2019 330xi without any other mods like lowering. Any suggestions? I'm seeing a lot of setups that will require spacers and I'd rather stay in the 20 range for offset and not use spacers (factory offset for what I have is 25). Not even sure how this all would look...
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      04-30-2020, 04:44 PM   #9
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255 is the max width recommended for 8.5J rim by all experts in tyre / wheel / vehicle mfg. They know what they're talking about and thus the advice should be respected. Especially when tyres are the only point of contact with the road.

If your aim is to have the wheels sit flush with the body work - spacers are what you'll need.

If you want to eliminate the gap between tyre and wheel arch then you'll need to lower the car.
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      04-30-2020, 05:37 PM   #10
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Interesting, so I could run 4x 245/40/19's on my 19x8 wheels? or that may impact my speedometer too much?

here's a link I found that ( answered my question above) shows how changing the stock tire sizes affect the speedometer, diameter, revs per mile etc. Pretty nifty calculator which has helped me decided that 235 is the ideal size I need for my purpose.

https://www.tacomaworld.com/tirecalc...0r19-235-40r19


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      08-30-2020, 07:38 PM   #11
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You can run a 255/35/19 front tire on a 19x9 rim, and a 275/35/19 rear tire on a 19x10 rim.
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      08-30-2020, 11:21 PM   #12
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Isn't there an issue if you go wider with the tire in terms of handling?
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      09-01-2020, 03:34 PM   #13
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Quote:
Originally Posted by kirr89 View Post
Isn't there an issue if you go wider with the tire in terms of handling?
It all depends on the tire and wheel offset. If you are too aggressive, you will impact the scrub radius of the suspension and that will make it handle worse. Tire width usually has more impact on turn radius and there are also diminishing returns as you go wider.

Keep in mind that the factory tires are paired with the suspension and generally set up for the vehicle to be neutral in the handling department with a slight understeer. There is nothing wrong with going a few sizes wider in the front to help the car come around better.

I'm currently running a 255/35/19 PS2 upfront and have no issues what so ever. Car handles like it's on rails.
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      09-01-2020, 11:37 PM   #14
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Quote:
Originally Posted by TheDudeMan View Post
It all depends on the tire and wheel offset. If you are too aggressive, you will impact the scrub radius of the suspension and that will make it handle worse. Tire width usually has more impact on turn radius and there are also diminishing returns as you go wider.

Keep in mind that the factory tires are paired with the suspension and generally set up for the vehicle to be neutral in the handling department with a slight understeer. There is nothing wrong with going a few sizes wider in the front to help the car come around better.

I'm currently running a 255/35/19 PS2 upfront and have no issues what so ever. Car handles like it's on rails.
I'm literally searching for the past week for tires. My 330i has 225/45R18 run flats. When you look it up, you'll see barely any options. Any very little of those are decent. I'm genuinely considering going the Michelin Pilot Sport 4 ZP route and hoping they hold up in winter. LOL
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      09-02-2020, 09:21 AM   #15
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It took me a month to figure out the what's the most aggressive you can go on this car. I'm speaking from the x drive perspective

On the front: max width 9.0 for wheels and 245/40 for tires
For rear: 9.5 wheels and 265/35 for tires
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      09-02-2020, 11:23 AM   #16
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Quote:
Originally Posted by kirr89 View Post
I'm literally searching for the past week for tires. My 330i has 225/45R18 run flats. When you look it up, you'll see barely any options. Any very little of those are decent. I'm genuinely considering going the Michelin Pilot Sport 4 ZP route and hoping they hold up in winter. LOL
I feel you - all the options suck.

I highly discourage going with PS4's in the winter. Buy a second set of wheels with summer tires and run the OEM runflats in the winter.
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      09-30-2020, 10:24 PM   #17
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Quote:
Originally Posted by Mr.G20 M340 View Post
It took me a month to figure out the what's the most aggressive you can go on this car. I'm speaking from the x drive perspective

On the front: max width 9.0 for wheels and 245/40 for tires
For rear: 9.5 wheels and 265/35 for tires
Quote:
Originally Posted by Mr.G20 M340 View Post
It took me a month to figure out the what's the most aggressive you can go on this car. I'm speaking from the x drive perspective

On the front: max width 9.0 for wheels and 245/40 for tires
For rear: 9.5 wheels and 265/35 for tires
Do you have any examples of that setup? The max tire size and size? I'm lowered on HR and with xdrive. Considering those options myself.
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      10-01-2020, 08:18 AM   #18
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Quote:
Originally Posted by Mr.G20 M340 View Post
It took me a month to figure out the what's the most aggressive you can go on this car. I'm speaking from the x drive perspective

On the front: max width 9.0 for wheels and 245/40 for tires
For rear: 9.5 wheels and 265/35 for tires
I've seen others who have 10" + rears, no?

I have 8.5" 235/35/20 and 9.5" 265/30/20 and no issues at all. I also have Xdrive
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      10-01-2020, 09:53 AM   #19
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Quote:
Originally Posted by ruczko View Post
Quote:
Originally Posted by Mr.G20 M340 View Post
It took me a month to figure out the what's the most aggressive you can go on this car. I'm speaking from the x drive perspective

On the front: max width 9.0 for wheels and 245/40 for tires
For rear: 9.5 wheels and 265/35 for tires
Quote:
Originally Posted by Mr.G20 M340 View Post
It took me a month to figure out the what's the most aggressive you can go on this car. I'm speaking from the x drive perspective

On the front: max width 9.0 for wheels and 245/40 for tires
For rear: 9.5 wheels and 265/35 for tires
Do you have any examples of that setup? The max tire size and size? I'm lowered on HR and with xdrive. Considering those options myself.
Quote:
Originally Posted by ruczko View Post
Quote:
Originally Posted by Mr.G20 M340 View Post
It took me a month to figure out the what's the most aggressive you can go on this car. I'm speaking from the x drive perspective

On the front: max width 9.0 for wheels and 245/40 for tires
For rear: 9.5 wheels and 265/35 for tires
Quote:
Originally Posted by Mr.G20 M340 View Post
It took me a month to figure out the what's the most aggressive you can go on this car. I'm speaking from the x drive perspective

On the front: max width 9.0 for wheels and 245/40 for tires
For rear: 9.5 wheels and 265/35 for tires
Do you have any examples of that setup? The max tire size and size? I'm lowered on HR and with xdrive. Considering those options myself.
I went with 19x8.5 and 9.5, the manufacturer for my wheels doesn't make 9.0 for some silly reason
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      10-01-2020, 10:18 AM   #20
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Quote:
Originally Posted by Gdiddy23 View Post
I've seen others who have 10" + rears, no?

I have 8.5" 235/35/20 and 9.5" 265/30/20 and no issues at all. I also have Xdrive
Can you send me some pictures of your setup?
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      10-01-2020, 12:54 PM   #21
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Quote:
Originally Posted by ruczko View Post
Quote:
Originally Posted by Gdiddy23 View Post
I've seen others who have 10" + rears, no?

I have 8.5" 235/35/20 and 9.5" 265/30/20 and no issues at all. I also have Xdrive
Can you send me some pictures of your setup?
Here are some ones I took a few weeks back. The black spokes don't show up very well in the photos FYI
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      10-01-2020, 01:25 PM   #22
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Quote:
Originally Posted by Gdiddy23 View Post
Here are some ones I took a few weeks back. The black spokes don't show up very well in the photos FYI
That looks great, nice choice in wheels! Are those AZENIS FK510? I'm lowered on HR springs, are you lowered as well? Hard to tell with angles. I'm wondering if I'll rub with the extra width.
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