[beevanka]

Hi Guys.

Do you think it's a good idea to have 18' wheels 245 tires all around?

I saw someone has 245 all around, so I was thinking to buy another set of OEM 18' wheels and put the back wheels in the front, with PPS tires?

Not sure if it's good

[TajoMan]

I don't think OEM rear wheel will fit in front. (I believe it has 52mm offset)

you need a rim with very specific offset to put 245 in front.

[pikcachu]

Originally Posted by beevanka

Hi Guys.

Do you think it's a good idea to have 18' wheels 245 tires all around?

I saw someone has 245 all around, so I was thinking to buy another set of OEM 18' wheels and put the back wheels in the front, with PPS tires?

Not sure if it's good

245 on 17x8 et40 works... et42 would be the ideal...

[beevanka]

Originally Posted by pikcachu

245 on 17x8 et40 works... et42 would be the ideal...

Saw someone running BBS CH-R with 245/35/18 on all four wheels on Instagram

Originally Posted by pikcachu

245 on 17x8 et40 works... et42 would be the ideal...

[dradernh]

Originally Posted by beevanka

Saw someone running BBS CH-R with 245/35/18 on all four wheels on Instagram

Given the reality of changing wheel and tires sizes generally, and especially in the rear of these 2 Series cars, I would suggest being prepared to experiment, if only on paper, with wheel widths, tire widths, offsets, and cambers, front and rear.

In my experience, the fastest and cheapest way is to engage qualified shops and/or vendors to help you navigate your way through the maze. I say this as someone who over the years and across many BMWs has bought multiple sets that were supposed to fit, should have fit, and I was just sure would fit. My takeaway from those missteps is this: thorough research is your friend.

Oh, and don't forget fender-rolling as another tool that can help you get what you want.

[ralawren]

Originally Posted by dradernh

Given the reality of changing wheel and tires sizes generally, and especially in the rear of these 2 Series cars, I would suggest being prepared to experiment, if only on paper, with wheel widths, tire widths, offsets, and cambers, front and rear.

In my experience, the fastest and cheapest way is to engage qualified shops and/or vendors to help you navigate your way through the maze. I say this as someone who over the years and across many BMWs has bought multiple sets that were supposed to fit, should have fit, and I was just sure would fit. My takeaway from those missteps is this: thorough research is your friend.

Oh, and don't forget fender-rolling as another tool that can help you get what you want.

With the correct offset or spacers they should fit. I ran 245/35/18 on stock 18/7.5" wheels. It was an error but the 245's fit fine. I plan on using them for track days. 18x8, offset 42 on all 4 wheels. Check this site to see how well they will fit.

https://www.willtheyfit.com/

[skievl23]

225/45/18 ET30 does NOT work. choose a different offset or they will rub, as mine did

[ralawren]

Originally Posted by ralawren

With the correct offset or spacers they should fit. I ran 245/35/18 on stock 18/7.5" wheels. It was an error but the 245's fit fine. I plan on using them for track days. 18x8, offset 42 on all 4 wheels. Check this site to see how well they will fit.

https://www.willtheyfit.com/

UPDATE: I just ran a square set up at the driving school yesterday and everything was fine. I purchased 18x8" 42 offset wheels and ran 245/35/18 Michelin PSS. Everything worked fine, no rubbing and the square set up had less understeer than the staggered. I do not recommend the PSS for the track, but am using because they were my original street tires and didn't want to throw them away. When these are gone I am replacing them with a Street/Track performance tire from Hankook, Toyo or Bridgestone.

[Maynard]

Thx for the info, considering this myself for track set. Was that w/ spacers in front, or just by themselves?

[ralawren]

Originally Posted by Maynard

Thx for the info, considering this myself for track set. Was that w/ spacers in front, or just by themselves?

No spacers with 18x8 and 42 offset. No clearance issues at all.

[GregoryG]

I'm about to do the same thing. Just purchased two 18x8 436M rears from a staggered set and going with square 245/35R18 all around. I realize there'll be clearance issues in the front due to the offset so I'm also getting 12 and 15mm spacers to account for that.

[esoulliard]

FWIW, I also run a 245/35/18 square setup. I've done multiple track days with no issues. My offset is 40 all around. It helped reduce understeer - the car feels very neutral now.

[hwntime]

Originally Posted by esoulliard

FWIW, I also run a 245/35/18 square setup. I've done multiple track days with no issues. My offset is 40 all around. It helped reduce understeer - the car feels very neutral now.

Are you 18x8 with the +40? That's what I'm on and thinking about going 245 up front too.

[bryan_G01]

MPss in 245 is like a 235 in other brands tires.

You will probably rub in the front, depnds on the offset but a pair of spacers will take care of that.

Also if you are dropped, it wont fit in the rear probably unless you drop the sidewall down.
On stock ride height, i was able to fit 18x40x235 Nitto 01s which is a wide tire without much rubbing.

[rich8566]

Bryan - When I had my 235i, for track days I ran a square setup on 17x8" wheels with the 245/40ZR-17 Hankook R-S3 (Version 2) SL tires. I don't recall the offset, but it was probable an ET40 all around. No issues with running or clearance with this setup. This was a great setup for several reasons. First, I could swaps wheels and tires front to rear. Also, the Hankooks have a super stiff sidewall, so they don't eat tires like the MPSS. Second, this setup saves about 7-8 pound per wheel. Plus, 17 inch tires are cheaper than 18s. To counter act the inherent front end push of the 235i, I ran the fronts with 2lb more pressure than the rears. I'll see if I can find a post I did several years ago with all of the details. Note - Hankook now has the R-S4 which is an update to the R-S3. I run the R-4s on my M2 and they are a great tires.

[rich8566]

Here's the exact track setup I used on my '14 235i: 17" Kosei K4R 17x8 et42 on all four corners with 245/40/17 Hankook RS3s.