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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Wheels / Tires / Suspension / Brakes Considering moving to a square setup - Need advice.
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      02-28-2019, 04:38 PM   #1
Fly335dguy
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Considering moving to a square setup - Need advice.

Greetings,

I am considering moving from a staggered setup to a square setup and wanted to ask advice from the group.

Here's what I've got:
535dx m-sport on staggered style 351M 19" x 8.5" Fr & 19" x 9.0" Rr double-spoke wheels with P245/40R19 Fr & P275/35R19 Rr

Looking to move to:
Square setup with either:
8.5Jx20 ET33 or 9Jx20 ET44


Here are my questions:
1. Which rim size and offset is better for xdrive?
2. Which wheel would allow me the largest tire? I was hoping to go with 255/35R20 non-runflats all around.

Goals are to have a good balance of traction, ride quality and handling while being able to maximize tire duration. I also want to fill in the gap in the wheel well and tire.

I plan to upgrade to either ACS springs or KW Var3 coils at some point, so it will be lower a bit.

Thanks!
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      03-01-2019, 12:40 PM   #2
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Are you considering aftermarket wheels, or only OEM wheels?
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      03-01-2019, 02:30 PM   #3
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Quote:
Originally Posted by remmib View Post
Are you considering aftermarket wheels, or only OEM wheels?
Probably just the OEMs but I would be open to anything.
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      03-01-2019, 06:00 PM   #4
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Quote:
Originally Posted by Fly335dguy View Post
Greetings,

I am considering moving from a staggered setup to a square setup and wanted to ask advice from the group.

Here's what I've got:
535dx m-sport on staggered style 351M 19" x 8.5" Fr & 19" x 9.0" Rr double-spoke wheels with P245/40R19 Fr & P275/35R19 Rr

Looking to move to:
Square setup with either:
8.5Jx20 ET33 or 9Jx20 ET44


Here are my questions:
1. Which rim size and offset is better for xdrive?
2. Which wheel would allow me the largest tire? I was hoping to go with 255/35R20 non-runflats all around.

Goals are to have a good balance of traction, ride quality and handling while being able to maximize tire duration. I also want to fill in the gap in the wheel well and tire.

I plan to upgrade to either ACS springs or KW Var3 coils at some point, so it will be lower a bit.

Thanks!
On my very long journey of finding the most aggressive setup, I've noticed a few things. unless you are going very low on offset with an 8-9in wide it will require the assistance of spacers to help with fitment (lip to fender look)

as far as x-Drive, the only stipulation was the fronts and rear had to be within 1% of rotating mass. if you're going staggard that would be important but Since you are looking for a square setup that shouldn't be an issue. IMO the wider the better. can't beat more rubber on the road to put more power down or to grip in cornering. can't go wrong with 9 wide. 255 tires would be better paired with a 9 inch wide
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      03-03-2019, 01:09 PM   #5
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Quote:
Originally Posted by Flyguyin23 View Post
On my very long journey of finding the most aggressive setup, I've noticed a few things. unless you are going very low on offset with an 8-9in wide it will require the assistance of spacers to help with fitment (lip to fender look)

as far as x-Drive, the only stipulation was the fronts and rear had to be within 1% of rotating mass. if you're going staggard that would be important but Since you are looking for a square setup that shouldn't be an issue. IMO the wider the better. can't beat more rubber on the road to put more power down or to grip in cornering. can't go wrong with 9 wide. 255 tires would be better paired with a 9 inch wide
Many thanks!

Here's what I'm thinking, 20x9 et 44 all the way around with 255/35/20.

My question is whether or not the fronts will rub with that large of offset. I'm thinking it won't, but wanted to seek advice from others.

I plan to lower to either coils or ACS springs (1-2" drop).
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      03-03-2019, 08:25 PM   #6
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Quote:
Originally Posted by Fly335dguy View Post
Many thanks!

Here's what I'm thinking, 20x9 et 44 all the way around with 255/35/20.

My question is whether or not the fronts will rub with that large of offset. I'm thinking it won't, but wanted to seek advice from others.

I plan to lower to either coils or ACS springs (1-2" drop).
lsturbointeg has the most aggressive set of offset wide wheels on a NON M5 f10 that ive seen and he doesn't rub with 21 9.5 et30 in the front.

&

Remmib is the fitment god on the forums (his fitment is textbook perfect) and he is running 20x9 +26 in the front. I've read no complaints about him from rubbing.
(Between the two is the holy grail of fender to lip flush fitment for non M5 F10 fitment IMO)

I have 21x9+35 on the way and I plan on immediately putting on 10mm spacers on the front. Since your offset isn't as aggressive you should have NO issues with your setup. the only reason for doubt is if you have big brakes on her. If you don't your in the clear. btw different tires have different sidewall beef (like how thick and bulky it is) tires make a difference as well. BUT in your instance, you have plenty of room. Good luck brotha! your setup sounds like a really good tuck fitment great for bags!

Last edited by Flyguyin23; 03-03-2019 at 08:35 PM..
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      03-03-2019, 10:15 PM   #7
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Quote:
Originally Posted by Fly335dguy View Post
Many thanks!

Here's what I'm thinking, 20x9 et 44 all the way around with 255/35/20.

My question is whether or not the fronts will rub with that large of offset. I'm thinking it won't, but wanted to seek advice from others.

I plan to lower to either coils or ACS springs (1-2" drop).
With your proposed setup, I'd be concerned about the wheels or tires rubbing on the suspension on the front. Because your offset is 13mm more than stock, and because you are going with a 9" vice 8.5" wheel, and because you are going with a 255 vice 245 tire, the inside of the front rim & tire will be tucked in even more. The inside of the wheel will be 17.35mm / 0.68" closer to the suspension. The wider tire makes the edge move another 5mm closer too. Before you buy these wheels, I'd measure the current distance between your wheel/tire, and the suspension, and in particular the upper A-arm joint. If it is less that 1", then you may have a problem with your proposed setup.
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      03-04-2019, 02:54 PM   #8
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Quote:
Originally Posted by cdmulders View Post
With your proposed setup, I'd be concerned about the wheels or tires rubbing on the suspension on the front. Because your offset is 13mm more than stock, and because you are going with a 9" vice 8.5" wheel, and because you are going with a 255 vice 245 tire, the inside of the front rim & tire will be tucked in even more. The inside of the wheel will be 17.35mm / 0.68" closer to the suspension. The wider tire makes the edge move another 5mm closer too. Before you buy these wheels, I'd measure the current distance between your wheel/tire, and the suspension, and in particular the upper A-arm joint. If it is less that 1", then you may have a problem with your proposed setup.
Thanks, I appreciate that insight. Now it sounds unlikely to do a square setup and will probably stick with standard factory sizes.
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      03-04-2019, 04:38 PM   #9
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I have a square setup with 20x9 et 35 all the way around. You could probably put some spacers on the front but it looks ok to me
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      03-05-2019, 02:15 PM   #10
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255/35/20 fits very well on 9'' wide wheels. But ET44 is not a good fitment in the front, and as others have mentioned, I'm not sure it's clears the inside. Of course some spacers will fix that.
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      04-25-2019, 06:32 AM   #11
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Quote:
Originally Posted by JayBimmer83 View Post
I have a square setup with 20x9 et 35 all the way around. You could probably put some spacers on the front but it looks ok to me
Hi Jay,

All your wheel are in 9x20 ET35 ? No problèm on the front ? Because the Space between wheel/tyre and suspension are small ~3/4mm no ?

Thanks
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      04-25-2019, 06:50 AM   #12
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Quote:
Originally Posted by Lukaas54 View Post
Quote:
Originally Posted by JayBimmer83 View Post
I have a square setup with 20x9 et 35 all the way around. You could probably put some spacers on the front but it looks ok to me
Hi Jay,

All your wheel are in 9x20 ET35 ? No problèm on the front ? Because the Space between wheel/tyre and suspension are small ~3/4mm no ?

Thanks
yep they are all 20x9. And I have no problems with rubbing at all. When they were fitting the wheel without the tire it looked close to the suspension but once the car was on the ground it wasn't as close. I got Niche wheels and I even confirmed with them before I put the tires on. you should be good with 20x9 wheel and a 255x35x20 tires
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      05-17-2019, 09:04 PM   #13
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Need help please..20inch +40 offset wheels tucked

I just got 20x8.5 ET40 for my 2015 528xi which originally is stocked with 17x8 ET30. The recommended specs for it are 20x8.5 ET33 so it's a 7mm difference in space they're currently tucked and it looks kinda goofy so what size spacers might I need for both front and back? The spacers I saw start at 10mm so maybe go 15mm in the rear and 10mm in the front? I'm not really sure how far I can push it without having problems.
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      05-18-2019, 02:17 PM   #14
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Quote:
Originally Posted by Ozzy24 View Post
I just got 20x8.5 ET40 for my 2015 528xi which originally is stocked with 17x8 ET30. The recommended specs for it are 20x8.5 ET33 so it's a 7mm difference in space they're currently tucked and it looks kinda goofy so what size spacers might I need for both front and back? The spacers I saw start at 10mm so maybe go 15mm in the rear and 10mm in the front? I'm not really sure how far I can push it without having problems.
I'd rather go with 12mm in the front.
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      05-19-2019, 06:40 PM   #15
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Quote:
Originally Posted by remmib View Post
Quote:
Originally Posted by Ozzy24 View Post
I just got 20x8.5 ET40 for my 2015 528xi which originally is stocked with 17x8 ET30. The recommended specs for it are 20x8.5 ET33 so it's a 7mm difference in space they're currently tucked and it looks kinda goofy so what size spacers might I need for both front and back? The spacers I saw start at 10mm so maybe go 15mm in the rear and 10mm in the front? I'm not really sure how far I can push it without having problems.
I'd rather go with 12mm in the front.
So I ended up getting 12mm for the back and 10mm for the front since the front already kinda sticks out a little further then the back so it's spec'd for 33ET for 20x8.5 so the back will be ET28 and front ET30 so I think I should be good now it'll only stick out a tiny bit but hopefully get the more aggressive look I'm trying to go for versus the goofy looking tucked under which I currently have
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