[Roman G]

Hey all,

First of, I'm a tire noob..... so please help to pick a good tire setup with following conditions in mind.

Second, I live in NYC and I drive carefully, always avoiding garbage roads that we have here and maneuvering swiss cheese roads esp in the wintertime.

Have had the car for less than two months and already changed one tire - hit a pothole, and as I was changing that, I noticed the second tire has a bubble blown out.

2015 228i xDrive M-Sport (non staggered aka square)
These are Pirelli Cinturato P7 All Season Run Flat 225/40 R18 92v 500aa


My previous car (2013 G37S 6MT) has staggered stock summers non run flats Bridgestone Potenzas which were wonderful and not a single bubble or tire problem. Obv cant compare summer performance tire grip to all season run flats but non the less....

I'm debating switching to regular tires and carrying a spare and a jack (yes a spare I would have to secure somehow in the trunk and a jack, wrench and so on)

These tires are $250 each shipped (from tirerack) and every single dealer in the tri-state area has the tires on back order. Not too happy with the grip on these tires either.

My conditions are basically only that I need all seasons, running stock wheels and possibly dropping on H&Rs or m235xdrive springs (when they come out with springs for xdrive cars)

With all that.....

How bigger (taller?) can I go with the tire? or do I MUST stay with 225/40/18?

I understand I cant go wider hence im stuck with 225 however, can I go a little taller? say 45? to provide a little more cushion when going over obstacles? Im certain regular tires would give a bit more cusion over run flats and prevent having as many bubbles.

I have been looking at Continental ExtremeContact DWS which are very good and i've had them on my 2003 Maxima.


All advice is welcome.

Thank You

Roman

[overcoil]

Some tires do have on the sidewall a thicker scrub rubber that circles the circumference - so if the tires are getting scrubbed against curbs you get some protection.
Not sure if that feature is in tire sizes for this type of car.
As for potholes - would you buy 17" wheels ?

[pikcachu]

get these

http://www.tirerack.com/tires/tires....omCompare1=yes

[Roman G]

Bringing back this thread as I have one more question.

the stock tire on my 2015 228i xdrive is: 225/40/18 with 92v (that's 149mph)

1. Can I go wider or taller with the tire with the stock rims? for example say 245/45/18 or 225/50/18? in hopes of providing a bit more cusion against road hazards? or will this hinder handling?

2. xdrive is limited to 130mph hence my 92v tire rating wont see those speeds. However I do have the car in 120+ once in a while. Is it ok to get a tire rated up to 130mph instead of 149mph as i'll never see those speeds? (although I think im answering my own question because I would think its better to have a more capable tire rated up to 150 than 130 if im approaching 120+ mph)

damn I hate these runflats. I might have to go with regular tires and carry a full size spare...but that would be a headache more than I can imagine and nvm the extra weight.

[e30if]

Any particular reason you want to run all seasons vs getting a dedicated set of winter tires/ wheels?

[kd0t]

I too had the Pirelli Runflats. I changed them to v12 evo2s.

Front: 225/40/18
Rear: 245/40/18

225 in the rear is the dumbest thing ever. I would just spin them all the way to 2nd..

[pikcachu]

Originally Posted by Roman G

Bringing back this thread as I have one more question.

the stock tire on my 2015 228i xdrive is: 225/40/18 with 92v (that's 149mph)

1. Can I go wider or taller with the tire with the stock rims? for example say 245/45/18 or 225/50/18? in hopes of providing a bit more cusion against road hazards? or will this hinder handling?

2. xdrive is limited to 130mph hence my 92v tire rating wont see those speeds. However I do have the car in 120+ once in a while. Is it ok to get a tire rated up to 130mph instead of 149mph as i'll never see those speeds? (although I think im answering my own question because I would think its better to have a more capable tire rated up to 150 than 130 if im approaching 120+ mph)

damn I hate these runflats. I might have to go with regular tires and carry a full size spare...but that would be a headache more than I can imagine and nvm the extra weight.

http://www.2addicts.com/forums/showt...8#post17452708

with 225/45 your speedo will read 3.4% slower
http://www.willtheyfit.com/index.php...et2=42#content

with 225/50 your speedo will read 6.6% slower
http://www.willtheyfit.com/index.php...et2=42#content

you probably don't want anything above 1.5%

maybe do 235-45-17 instead

[jtzako]

Originally Posted by e30if

Any particular reason you want to run all seasons vs getting a dedicated set of winter tires/ wheels?

I would also go w/ all seasons simply because I do not have a place to store an extra set of wheels/tires safely and rarely is it actually necessary to have winter tires where I live (Colorado) since there is rarely any snow left on the roads in town. (the few times there is some, all seasons are sufficient or I just drive my 4x4 suv)