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[str8shot]

I need to order new tires today for an upcoming auto-x.

I've got 255/35/18 and 225/40/18 Michellin Pilot Super Sports currently, but I want to switch to the Direzza's. From what I hear they have much much better grip (according to the Grassroots Motorsports review - http://grassrootsmotorsports.com/articles/top-tires/).

Can anyone confirm 265/35/18 and 235/40/18 will fit?

I've currently got 15mm spacers in the front, but I could pull those off.

I've also got vorschlag camber plates in the front, but I don't want to run excessive camber and wear out the insides, and I won't roll any fenders.

If no ones tried them in that size, I'll probably just stick with the stock size +1.

[JSavela]

I have those exact tires and sizes sitting in my garage waiting to get mounted up on my stock wheels. Now that the 265 is here in person, I'm worried it won't fit. Once the foot of snow melts up here in MN, I'll be getting them mounted up. I'll definitely provide my feedback on fitment. In the meantime, hopefully someone else will chime in.

[b1aze]

Originally Posted by JSavela

I have those exact tires and sizes sitting in my garage waiting to get mounted up on my stock wheels. Now that the 265 is here in person, I'm worried it won't fit. Once the foot of snow melts up here in MN, I'll be getting them mounted up. I'll definitely provide my feedback on fitment. In the meantime, hopefully someone else will chime in.

If you can measure the actual tire width, i can measure my MPSS and see how they compare. They shouldnt be a whole lot different mounted up

[tommay248]

I just installed the tires 235s all around. They ride smooth but a little louder than my run flats. They will be used on the track tomorrow so I can give better input.

[Adam135]

PSS are the best, why would you switch?

Originally Posted by tommay248

I just installed the tires 235s all around. They ride smooth but a little louder than my run flats. They will be used on the track tomorrow so I can give better input.

Louder than the stock run flats???

[str8shot]

Originally Posted by Adam135

PSS are the best, why would you switch?

They're ok, but they're far from the best.

I wasn't really impressed with them at all. Too soft of shoulder.

Star Spec's are generally considered the tire of choice for auto-x.

[Black Sheep]

I run 235/275 star specs on arc 8's no problem

[Kgolf31]

Originally Posted by Adam135

PSS are the best, why would you switch?

Louder than the stock run flats???

Lol another person who is blinded by marketing and people who don't know anything about tires.

BFG rivals, Hankook RS3s and Dunlop zIIs will run laps around the PSS.

OP - I don't know about tire clearances but the ZII is an awesome tire, and it will be my next tire to buy. Don't be concerned with more camber. Run zero toe in the front and you won't see excessive inside wear.

I run -2.3 at 0 toe on my z4, and still see more outside wear still on my shoulders. Heavy autoxer here as well

[JSavela]

The 265/35 ZII tire is just a hair under 11" wide at the widest part of the sidewall, unmounted. I measured it by laying the tire on its side and laying a board across the tire's diameter. Then I measured from the floor to the under side of the board. I figure this method is easy to repeat when trying to compare with other tires.

[fe1rx]

Originally Posted by Adam135

Louder than the stock run flats???

The Direzza ZII tread noise is very loud. Z1's I found got louder after every good track outing. I just installed ZII's and I am impressed by the grip. That said they were loud from the get go. While I have Ground Control street camber plates, which no doubt transmit a bit more noise into the car than the OE strut tops, I would suggest that unless you actually get to use that grip at a track or autocross you will regret choosing the ZII's because they are so noisy.

I am running a square 225 setup, so can't help you with your sizing question.

[Bdh821]

I will agree on the road noise of the Z1's. I just recently started driving my 135 again after being in my nice and quiet 330xi all winter. And HOLY SHIT these things are loud. Amazing autox grip tho!

[JSavela]

Originally Posted by JSavela

The 265/35 ZII tire is just a hair under 11" wide at the widest part of the sidewall, unmounted. I measured it by laying the tire on its side and laying a board across the tire's diameter. Then I measured from the floor to the under side of the board. I figure this method is easy to repeat when trying to compare with other tires.

I got my tires mounted up this weekend. I did some very aggressive slaloms at about 45mph and hit some pretty big dips on the highway at speed with zero rubbing, yet. I'll follow up on this post if I do notice any rubbing at all.

[str8shot]

Originally Posted by JSavela

I got my tires mounted up this weekend. I did some very aggressive slaloms at about 45mph and hit some pretty big dips on the highway at speed with zero rubbing, yet. I'll follow up on this post if I do notice any rubbing at all.

Nice! Please keep me updated, I'll buy the same setup if it fits with no rubbing.


Are you lowered at all?

[JSavela]

I'm completely stock suspension wise except for drilled out alignment pins.

[JSavela]

Well, I've managed to get some slight rubbing on the outer shoulder of both fronts. I never heard any noise, but there is about 1/8" wide rub mark on the tires. It's very minor and happened maybe once or twice. The rears don't show any signs of rubbing. I've only had myself and one passenger in the car so far. Maybe if I had four people in it, I'd see something. I'll add more info if I notice anything else worth adding.

[str8shot]

Originally Posted by JSavela

Well, I've managed to get some slight rubbing on the outer shoulder of both fronts. I never heard any noise, but there is about 1/8" wide rub mark on the tires. It's very minor and happened maybe once or twice. The rears don't show any signs of rubbing. I've only had myself and one passenger in the car so far. Maybe if I had four people in it, I'd see something. I'll add more info if I notice anything else worth adding.

Hmm. Any idea how much camber you're running?

Maybe I'll stick with 225/40 and 255/35 for the time being.

[JSavela]

Originally Posted by str8shot

Hmm. Any idea how much camber you're running?

Maybe I'll stick with 225/40 and 255/35 for the time being.

Not much at all. I would guess between -.5 and -1 degree at most. All I did was drill out the alignment pins and slide the struts in as far as they would go.