[Anthony1s]

Originally Posted by mdma-zn

An update:
I have been running with the Toyo R888Rs 295/30/19 in the rear and the oem 245/35/19 in the front.

The stability of my car is aweful. 50mm diff between front and back is clearly a dont-do-it mod. Im loving the Toyos in the back and putting the power down nicely with my BM3 tune.

In this interim I am going fast in straight lines only. I am not sure if 255/45/19 will improve things significantly. I may have no choice but to go 265/30/19.

Yea, only rear engine cars can get away with that big of a size difference between front and rear.

You have me concerned though, cause I have a set of 265/285 winter tires that run wider and taller than 265/285 summer tires. I hope they fit.

[dcmac]

Hang on... so you guys are saying I can't run 265/35/19 and 285/35/19 RE71's on the stock rims, even with spacers and camber?

I am reading 255/275 or even 255/285 is the go... however I'm sure I've read all over this forum the 265/285 combo fits just fine, even in RE71's... ?

[mdma-zn]

The diameter of 265/45/19 Michellin PSS is 26.3".
If the RE71 has a similar or bigger diameter then unlikely to work.

[ZM2]

Originally Posted by dcmac

Hang on... so you guys are saying I can't run 265/35/19 and 285/35/19 RE71's on the stock rims, even with spacers and camber?

I am reading 255/275 or even 255/285 is the go... however I'm sure I've read all over this forum the 265/285 combo fits just fine, even in RE71's... ?

It’ll work. However, it will rub until you wear a few mm off the tire or fender liner.

Also, your call if you want to go 255 or 265 on a 9” rim. 265 is a little too wide, so turn in feel is worse than 255. But, the 265 will have more ultimate grip.

[BGR]

Originally Posted by JTO24

Off-topic but wow I love your E90 M3! Slicktop SS is perfect

Side note, but we have had very similar cars.

Mine went: e39 M5 --> 135i --> 981 S --> e92 M --> --> F80 --> 981 GTS --> M2C (on order). All of mine have been MT though.

[CSBM5]

Originally Posted by JTO24

Off-topic but wow I love your E90 M3! Slicktop SS is perfect

Thanks! It's hard to fathom the car will be nine years old already in October! No plans to part with it anytime soon. Here's a better angle for slicktop viewing:

[BGR]

Originally Posted by CSBM5

Thanks! It's hard to fathom the car will be nine years old already in October! No plans to part with it anytime soon. Here's a better angle for slicktop viewing:

If you do decide to sell it, let me know!

[OldDirtyCoaks]

Originally Posted by mdma-zn

Upgraded rears to Toyo R888R 295/30/19 and decided to put the original rear tyres up front. My front tyres were touching when fully turning.
265 is just too wide... quite disappointing especially since the 265s looked full and really good!

I put the original 245/35/19s back on the front and will drive like this for a while. I have not noticed any adverse effects from the current 50mm width differential but then again i have not pushed my M2C hard enough yet...

R888R has so much more grip but be prepared for road noise! I knew this was going to be the case, when i opted for the Toyo's rather than the PS4S's.

How far do you have to turn for them to rub?

I want to run 265s up front and 285s im back because I want the extra grip and because I'm a terrible parker in an urban area and I am sick and tired of clipping my passenger side rims on curbs and need the extra protection plus I hate the stretched look.

[OldDirtyCoaks]

Originally Posted by ZM2

The 265/35 rubs bc it’s a taller tire. Once you wear the tire and fender liner a few mm, it fits without rubbing.

That said a 265 on a 9” rim creates lazy turn in, and the 265 on our cars is meant to be a rear tire and has less channels for rain dispersion.

So, the widest/tallest I’d go on the stock front rims is 255/35/19. A little less lateral grip, but it doesn’t rub, hydroplanes less, and turn in is sharper.

I think I’ll have to run the 255s up front then because it rains like 160 days a year here.

Im an OK autocrosser/trackdriver but not at the point of consistency where I would notice dull turn in more then how my own inputs influence the car.

Its been awhile since I’ve seen a non-comp M3-4 to see how the 255 tires fit on the wheel, hopefully it takes away most of the stretch.

[ZM2]

Originally Posted by OldDirtyCoaks

I think I’ll have to run the 255s up front then because it rains like 160 days a year here.

Im an OK autocrosser/trackdriver but not at the point of consistency where I would notice dull turn in more then how my own inputs influence the car.

Its been awhile since I’ve seen a non-comp M3-4 to see how the 255 tires fit on the wheel, hopefully it takes away most of the stretch.

You only notice the extra hydroplaning at highway speed or as the tread depth gets lower, so your call.

245 looks stretched, 255 looks like it fits, 265 bulges slightly but really just looks more square.

[Anthony1s]

Hmm, in another thread someone pointed out that the front wheel liners are different between the M2 and M2C and might be causing their issue. I wonder if that could be the issue with OP here too. Might be that M2C just can't fit 265/35 like the M2 can.

https://f87.bimmerpost.com/forums/sh....php?t=1624545

[Proctor750]

Originally Posted by Anthony1s

Hmm, in another thread someone pointed out that the front wheel liners are different between the M2 and M2C and might be causing their issue. I wonder if that could be the issue with OP here too. Might be that M2C just can't fit 265/35 like the M2 can.

https://f87.bimmerpost.com/forums/sh....php?t=1624545

Interesting. The rear halves of the liners up front are the same, but the front halves are indeed different. It could just be parts #12,13,14 which are missing on OGM2 which are mounting hardware, so perhaps the only difference is where/how the front plastic bumper cover attaches to it and not physical dimensions:

[OldDirtyCoaks]

Originally Posted by Proctor750

Interesting. The rear halves of the liners up front are the same, but the front halves are indeed different. It could just be parts #12,13,14 which are missing on OGM2 which are mounting hardware, so perhaps the only difference is where/how the front plastic bumper cover attaches to it and not physical dimensions:

Nice find!

[CSBM5]

Restarting the 265/35 front fitment question...

I noticed that on the BMW CCA raffle car (M2C with loads of Dinan parts) in the closeup picture of the front wheel, they are using a PS4S in 265/35-19 up front. It's on different wheels although the real issue we're supposed to have isn't width related of course...it's diameter related. I wonder if Dinan has somehow clearanced the fender liner or they just let the thing rub.

[PilotxERAU]

Originally Posted by CSBM5

Restarting the 265/35 front fitment question...

I noticed that on the BMW CCA raffle car (M2C with loads of Dinan parts) in the closeup picture of the front wheel, they are using a PS4S in 265/35-19 up front. It's on different wheels although the real issue we're supposed to have isn't width related of course...it's diameter related. I wonder if Dinan has somehow clearanced the fender liner or they just let the thing rub.

They ended up using 275/30 295/30 on that car. Monster meat! They have a video of it with all the wheel/tire specs.

[CSBM5]

Originally Posted by PilotxERAU

They ended up using 275/30 295/30 on that car. Monster meat! They have a video of it with all the wheel/tire specs.

Thanks! Dinan_Engineering replied in a PM also that they had rubbing issues with the 265/35 up front and the 275/30 fit without issue. They did mention that the 295/30 in the rear needed "some minor rework to the rear fender." I imagine that is due to the wheel width/offset they used since many report those fit fine.

Ok, so I guess I'm ready to finally place my order for autox tires (RE-71R) and will just go with 255/35-19 up front.

[M2joey]

Originally Posted by CSBM5

Thanks! Dinan_Engineering replied in a PM also that they had rubbing issues with the 265/35 up front and the 275/30 fit without issue. They did mention that the 295/30 in the rear needed "some minor rework to the rear fender." I imagine that is due to the wheel width/offset they used since many report those fit fine.

Ok, so I guess I'm ready to finally place my order for autox tires (RE-71R) and will just go with 255/35-19 up front.

I run 255/35 RE-71s in the front, you will have absolutely no problem at all. I have run 265/35 RE-71s in the front and they rub big time, under the most extreme compression on the track, even after the rubber bits are worn. The 265/35 makes the front feel vague and a bit sloppy as well, imo.

[Commanderwiggin]

Originally Posted by isjoey

I run 255/35 RE-71s in the front, you will have absolutely no problem at all. I have run 265/35 RE-71s in the front and they rub big time, under the most extreme compression on the track, even after the rubber bits are worn. The 265/35 makes the front feel vague and a bit sloppy as well, imo.

Do you have any photos of where the 265/35 are rubbing? I plan to run the 265/35/19 front (no 255/35 available in R888R) and 285/35/19 rear.
If I have an idea where the rubbing is, perhaps I can modify the fender liner in that zone...or if it's the strut I'll have to be mindful when choosing coilovers.

[omasou]

Originally Posted by Proctor750

Interesting. The rear halves of the liners up front are the same, but the front halves are indeed different. It could just be parts #12,13,14 which are missing on OGM2 which are mounting hardware, so perhaps the only difference is where/how the front plastic bumper cover attaches to it and not physical dimensions:

M2C front liner has a hole for the brake duct.

[ssabripo]

@mdma-zn , do you have any pics of the 295/30 rears? thanks in advance

[whoop_ass]

Also factor in that 295 is not really meant for 10inch rim
min should be a 10.5J and ideal 11J
yes you can do it, but it's not ideal

[mdma-zn]

Originally Posted by ssabripo

@mdma-zn , do you have any pics of the 295/30 rears? thanks in advance

My cold tyre pressure is 30 PSI....