[AlpsRider]

Wow, that's a lot of tire! I wonder if they needed camber plates or if there is room for coilovers.

[VisualEcho]

Originally Posted by Apex Hitter

Those are the tire sizes in this picture which I confirmed with Dinan.

Um, whomever you spoke with at Dinan is confused.

The car in question wears 265/35 & 285/35 PS4S tires, which is why they look like balloons. A 275/30 and 295/30 would have MUCH squarer sidewalls.

And if you look close, you can see the size clearly.

[VisualEcho]

Not that I agree with Dinan at all on this one. Terrible size choice IMO.

[CSBM5]

Originally Posted by VisualEcho

Um, whomever you spoke with at Dinan is confused.

The car in question wears 265/35 & 285/35 PS4S tires, which is why they look like balloons. A 275/30 and 295/30 would have MUCH squarer sidewalls.

And if you look close, you can see the size clearly.

They weren't confused at Oktoberfest in 2019 when the Dinan M2C (part of the BMW CCA raffle) did indeed have the 275/30 and 295/30-19 tires installed on it. I spoke with the rep and he indicated they had rubbing with the 265/35-19 up front and switched to the other sizes. I recall him saying they did have a bit of rub in the rear which they rolled/pulled the fender lip (lowered car with wider wheels as I recall). Also, there were two other M2Cs at O'fest I came across with 275/30 and 295/30-19s installed, PS4S on both. The one driver I spoke with said he had no issues with rubbing at all (stock suspension).

[VisualEcho]

Originally Posted by CSBM5

They weren't confused at Oktoberfest in 2019 when the Dinan M2C (part of the BMW CCA raffle) did indeed have the 275/30 and 295/30-19 tires installed on it. I spoke with the rep and he indicated they had rubbing with the 265/35-19 up front and switched to the other sizes. I recall him saying they did have a bit of rub in the rear which they rolled/pulled the fender lip (lowered car with wider wheels as I recall). Also, there were two other M2Cs at O'fest I came across with 275/30 and 295/30-19s installed, PS4S on both. The one driver I spoke with said he had no issues with rubbing at all (stock suspension).

Dinan's original spec of 9.5 +31 with 265/30, and 10.5 +42 with 285/30 Pirelli's, lowered to their spec (same as BMW spec I believe, 595/600), is perfection, and I suspect that they changed to the larger, and MUCH taller 265/35 / 285/35 just to use the PS4S. Which was obviously a mistake, and I mean, they could have asked me first and I would have educated them for free .

And yeah, you can **probably** use the bigger 275/30 / 295/30 PS4S combo without rubbing...on stock suspension, but who the hell wants that?

And if I'm honest, I'm still not buying that the 275/30 doesn't rub up front.

[VisualEcho]

Just too funny. lol

Video production fail.

[flybigjet]

Originally Posted by VisualEcho

Just too funny. lol

Video production fail.

I'm surprised that a 275/30 fit in the front with any drop at all on a M2C.

You'd think there would just HAVE to be rubbing.

R.

[CSBM5]

Originally Posted by VisualEcho

Just too funny. lol

Video production fail.

You're looking at their initial setup like I mentioned prior. Nothing wrong with them realizing a problem and correcting it. After talking with a Dinan rep at O'fest and seeing the car with the 275/295, etc, I corresponded with them directly via PM here. Here's their exact reply from that:

The original tires that Michelin supplied were 35 series tires which were NOT requested (30 series is what was asked for). Those 35 series tires were fine when the car was in a straight line but during extreme turn in they would rub a bit. The final tire fitment for the car is 275/30-19, 295/30-19. With those the front is fine but we did do some minor rework to the rear fender to accommodate the wider tires.

[VisualEcho]

Originally Posted by flybigjet

I'm surprised that a 275/30 fit in the front with any drop at all on a M2C.

You'd think there would just HAVE to be rubbing.

R.

You and me both, that's why I want to know the drop/camber specs.

Originally Posted by CSBM5

You're looking at their initial setup like I mentioned prior. Nothing wrong with them realizing a problem and correcting it. After talking with a Dinan rep at O'fest and seeing the car with the 275/295, etc, I corresponded with them directly via PM here. Here's their exact reply from that:

What they really need to tell you is the exact drop the car has, if any, and the camber specs. But regardless, most guys are not going to work their quarter (not fender) to fit the 295.

The weird thing is that they're not getting any appreciable increased performance from the bigger, heavier PS4S that the couldn't have gotten from dropping the PSS psi by 5, or merely fitting the Cup2 instead. You could make the argument that they chose the PS4S for rain, but then they would have made it worse by choosing the increased widths.

Things that make you go hmmm...

[flybigjet]

Hold on a hot second.

How was Dinan getting rubbing bad enough in the rear to have to roll the fender, but Apex is selling a rear wheel specifically fitted to a 295/30/19 with no rubbing, even if lowered?

Confused.

[CSBM5]

Originally Posted by flybigjet

Hold on a hot second.

How was Dinan getting rubbing bad enough in the rear to have to roll the fender, but Apex is selling a rear wheel specifically fitted to a 295/30/19 with no rubbing, even if lowered?

Confused.

Offset differences most likely. Apex does an excellent job at zeroing in on the right offset for a given wheel width for their wheels from my experience owning multiple sets of their wheels.

[flybigjet]

Originally Posted by CSBM5

Offset differences most likely. Apex does an excellent job at zeroing in on the right offset for a given wheel width for their wheels from my experience owning multiple sets of their wheels.

Dinan doesn't exactly publish their offsets, but if you read their installation instructions, you find this:

The 19x9.5 wheels are for the front of the car.
- Confirm you have the correct wheels. The wheels should measure about 10.5" wide overall, and stamped with “31” on the inside.

The 19x10.5 wheels are for the rear of the car.
- Confirm you have the correct wheels. The wheels should measure about 11.5" wide overall, and stamped with “42” on the inside.

So, if you plug those numbers into the rimsntires calculator, you get the chart below. Which doesn't make any sense, as it appears that the Apex wheels have even less clearance than the Dinan ones.

So, even more confused now.

[trey100]

I went 275/295 from 255/275 on my F80 and although I loved the look of the wide rear rubber, it did have a balloon look. On the F80, no issues at all with rubbing on those sizes in PSS.

[VisualEcho]

Originally Posted by flybigjet

So, even more confused now.

Much of the time rubbing has to do with how much you're lowered, and how tall the tire is. Remember the Bavarian Barbarian guy with the Signature (BC Forged) wheels with very wide-running tires (AD08R), and no rubbing? He was at stock height.

[flybigjet]

Originally Posted by VisualEcho

Much of the time rubbing has to do with how much you're lowered, and how tall the tire is. Remember the Bavarian Barbarian guy with the Signature (BC Forged) wheels with very wide-running tires (AD08R), and no rubbing? He was at stock height.

True-- but I was looking at "generic" calculation numbers, so they should be apples to apples?

And, the photo's isn't a M2C-- so there's additional clearance baked into it already (at least on the front) as the wheel shroud sits farther forward and doesn't have the brake-ducty thing?

[bngcruiser]

I'm enjoying this conversation, as I will be fussing come April/may trying to get my rear 19x11et37 Volk TE37's under the rear quarter.

I'm not too low though, and I'm prepared to fuss with the camber .. important thing for me was keeping the scrub radius dynamics the same :shrug:

We'll see, if it doesn't work an M3 or M4 owner will be happy to take the TE37's off my hands at the price I got them for.

Once weather breaks we'll get together here in south Denver and you can really give me a hard time for trying to stuff these suckers in there

[flybigjet]

Originally Posted by bngcruiser

I'm enjoying this conversation, as I will be fussing come April/may trying to get my rear 19x11et37 Volk TE37's under the rear quarter.

I'm not too low though, and I'm prepared to fuss with the camber .. important thing for me was keeping the scrub radius dynamics the same :shrug:

We'll see, if it doesn't work an M3 or M4 owner will be happy to take the TE37's off my hands at the price I got them for.

Once weather breaks we'll get together here in south Denver and you can really give me a hard time for trying to stuff these suckers in there

Deal!

My toy goes into DAS on the 23rd for PPF of my euro-spec bumper, redo of the PPF on the rear hindquarters (didn't like the cutline we tried), and refresh of the ceramic coating. Then, as soon as I pick it up, I'm taking it to Bimmerhaus to have the TCK suspension installed. I'll let it settle, then once my wheels come in, will finalize the height/drop/camber/etc. to accommodate the new wheel/tire combination I'll be running.

R.

[VisualEcho]

Originally Posted by bngcruiser

I'm enjoying this conversation, as I will be fussing come April/may trying to get my rear 19x11et37 Volk TE37's under the rear quarter.

You're only -8mm from recommended, so it's all going to come down to your height, the tire you run, and the camber. You can make that work, no problem.

[bngcruiser]

Originally Posted by VisualEcho

You're only -8mm from recommended, so it's all going to come down to your height, the tire you run, and the camber. You can make that work, no problem.

I think it'll work too, just always that bit of skepticism until I see it work!

[Zirok]

Hello, Someone could please put a photo of front wheels and configuration 255/35/r19 PS4S, but with the turn left the entire steering wheel to see that it does not scratch the mudguard, it is appreciated that I am in the dilemma if my M2 lci 2018 oem bump the cover. (I could not find a photo in the forum with the whole wheel to one side)

All this is for the reason I want to change my tires 245/35/R19 for 255/35/R19 in standard configuration without using spacers..someone, could help me.

thanks

[Karmic Man]

Originally Posted by flybigjet

Hold on a hot second.

How was Dinan getting rubbing bad enough in the rear to have to roll the fender, but Apex is selling a rear wheel specifically fitted to a 295/30/19 with no rubbing, even if lowered?

Confused.

Tyre height and the wheel offset

1. A 285/35 19 is over 2cm taller in diameter than a 295/30 19

2, Dinan rear wheel offset is ET42 vs Apex's ET45

[Downunder99]

Trying to make up my mind whether to switch my current 2018 M2 OE set of 245/35/R19 and 265/35/R19 PSS on 437M's to the M3/4 setup with 255/35/R19 and 275/35/R19 and at the same time switch to PS4S.
My rears are done and I think I have made up my mind to switch to PS4S, but the increased width I am still unsure. I read about too much grip from the PS4S / wider tire combination, the sligthly increased diameter of 0.3 inches (from 26.3 to 26.6 inch), etc. The factory winter wheel recommendation which I am running has the rears at 25.0 inch diameter, so one would think the 0.3 inch more on the 275 vs the 265 summers shouldn't really matter? Should I just upgrade from PSS to PS4S with the same OE standard width, but run some 10 mm spacers all around for better looks? Running everything stock in regards to suspension. Objective is to increase rear grip (but not too much), which I read the PS4S's will deliver on, but also have it look a little better than the factory setup in regards to the fender/wheel offset.
Trying to get some fresh opinions ...