Im thinking of getting Conti DW or Michelin PSS to replace the OEM tires. I was thinking of going an extra 10mm in width of stock for more grip so going to 235/40 and 265/35. Has anyone else done this? I think the stock wheels should be able to handle another 10mm width. I've checked the calculators and the % speed difference is very minimal about 1.26%. I also was contemplating if its possible to go to something like 245/35/18 and 275/35/18 (1.2%/2.3% difference respectively). I wouldve looked at 275/30 but they arent made in 18". I dont want the tiers to look stretched either.

 

10mm+ won't affect anything.

 

The more width you add to tire on stock rim, the more sidewall flex you get in return. It'll feel like the car is walking sideways when you break/accelerate which is not good. Might not notice it going with 235/265 though, but in general I'd suggest just getting wider rims, you can get a set for cheap that'll be close to stock, like 9/10, then run 235/265 or wider and still maintain the same feel. Some tires are better than others as far as sidewall stiffness, but some, like michelin ps2, are terrible with their thin sidewalls (for weight savings) unless you stretch them a bit. A slight stretch on tires is what I have found works best, but to each their own.

 

well 255/35 is apparently on national backorder with no ETA, so I decided to go 10mm wider around with 235/40/18 and 265/35/18. PSS is a bit meater and square on the sidewall than the ER33s which look stretched

 

Looks good to me, hows it feel?
Do you have spacers on as well?

 

no spacers, i didnt really have time to mess around with them much, it was rush hour when I got out. It feels less harsh over bumps but the tire sidewalls are thicker than before.

 

Do the tires rub going over bumps/uneven roads?

 

Wonder how these will look on a lowered setup with spacers...

 

they dont rub, im not lowered nor dont plan on lowering. They are bit thicker than what i expected them to be but Im not lowered so its not a big deal.

 

Looks good.

 

You should be fine. Shaddix makes a great point about gettting a bit more sidewall flex but assuming you are not tracking the car you are not likely to notice much of a difference and you havent upsized all too much.

You have also kept the relative diameters the same as each other front to rear which is good.

You can use the tire manufacturers specifications to see proper rim widths they recommend for their tire size as well.

Here is one for the PSS. Click the "specs" tab.

http://www.tirerack.com/tires/tires....=yes&tab=Specs

Mike

 

i plan to track the car occasionally hence getting PSS. Stock tires were ok, but they dont hold that much grip and michelin had a $70 MIR going on. Planning to sell the OEM tires off.

 

They look nice and fill up the wheel well gap a bit more than stock setup. I am going completely off-topic here, but where do you track your car? I have recently moved to Spring from Florida and have not done any tracking or autocross in a few years. I am actually a satisfied 335i owner who is thinking about switching to either IS350 or the upcoming TLX, just to taste another flavor

 

Not trying to sway you but you may want to check out the S04 tires. I have them on my Pcar and before that had S03 and have been extremely impressed. They are on a crazy special at tirerack right now. Just another option.

Mike

 

MSR Houston has some charity drive events where they let you on the track for pretty cheap, or I could do Drivers Edge which operates in TX at various tracks.

https://www.thedriversedge.net/

I looked at these but what turned me off was the weight (29# vs 23/24#), quite a bit heavier than the other contenders: Conti DW and Michelin PSS