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[RoundelM3]

18" tires are a little less expensive than the 19", and with a little more sidewall, they ride just a little softer. I'd say if you were looking to track your car, the 19s would be a little better suited, but I favor 18s for the street.

[1Pirate]

Originally Posted by roundel335

18" tires are a little less expensive than the 19", and with a little more sidewall, they ride just a little softer. I'd say if you were looking to track your car, the 19s would be a little better suited, but I favor 18s for the street.

I'd arugue just the opposite. 18" wheels and tires would be a better track set up because all other things being equal the combo should be lighter than with 19" wheels, thus less unsprung weight. For the street the 19" set up looks better on the car. Either way if both set ups used non runflat tires they would each provide a better ride than the OEM runflats regardless of size, 18" or 19".

[RoundelM3]

Thanks for reminding me about wheel weight - I'd forgotten about that. I prefer 18" myself, but a lot of guys like 19" on the track because of the shorter and thus stiffer sidewalls - although I'm sure they're buying the lighter-weight wheels when they do this. And both my cars have non-runflats...the set that came with my 07 E92 wore out in about 13K miles and were pretty harsh-riding. And doesn't the 1M come with 19" wheels for whatever reason?

[ModBargains.com]

Both the Alufelgen CS7 and Alufelgen SF-71 wheels do look great on the cars! Please see below for the recommended setups.

Alufelgen CS7
18x8.0 ET45 - 225/40/18
18x9.0 ET48 - 255/35/18

Alufelgen SF-71
19x8.0 ET45 - 225/35/19
19x9.0 ET48 - 255/30/19

PS:

[IMG]http://www.**********s.com/images/Products/MISC/Alufelgen-Stocking.jpg[/IMG]

[1Pirate]

Originally Posted by roundel335

Thanks for reminding me about wheel weight - I'd forgotten about that. I prefer 18" myself, but a lot of guys like 19" on the track because of the shorter and thus stiffer sidewalls - although I'm sure they're buying the lighter-weight wheels when they do this. And both my cars have non-runflats...the set that came with my 07 E92 wore out in about 13K miles and were pretty harsh-riding. And doesn't the 1M come with 19" wheels for whatever reason?

The wheels on the 1M are 19". I believe they are the same as the M3 wheels. They are also wider than the 1 series M sport wheels and come with larger tire sizes.

[d0scas]

Originally Posted by 1Pirate

The wheels on the 1M are 19". I believe they are the same as the M3 wheels. They are also wider than the 1 series M sport wheels and come with larger tire sizes.

To purchase 1m wheels and have them fitted you would need full m3 suspension because the offsets are different right ?

[1Pirate]

Originally Posted by d0scas

To purchase 1m wheels and have them fitted you would need full m3 suspension because the offsets are different right ?

I not sure about the suspension, but you would defiinitely need to roll the fenders and possibly make the fenders wider. The 1M is in essence a widebody 1 series with much wider fenders in order to accept the M3 wheels and tires.

I hate to harken back to my Corvette days for comparison, but it is the same with the regular C6 (prior to the Grand Sport) and the Z06. The Z06 is in essence a widebody Corvette. This was done in order to allow for wider wheels and tires.

That begs the question. Could one buy the 1M front and rear quarter panels and install them on a regular 1 series? You used to be able to do that with a regular Corvette and make your C6 look like a Z06. Of course now you can just buy a Grand Sport instead of a Z06 if you don't want to pay for the Z06. Chevy certainly saw a market for the Grandsport. Would BMW consider such a thing?

[d0scas]

I completely understand what you are saying about the 1m being a widebody 1 series but since I've seen on threads people running 265s on the rear of the 135i's I didn't kno if it was just an offset issue that would make it accept the 1m wheels

[1Pirate]

Yes it is all about wheel offsets and rolling the fenders. 265s will fit if you roll the fenders.

[fusion01]

Digging up an old thread here but has anyone fitted the Eibach Pro-Kit (1 inch drop) + Eibach Pro Dampers / Koni FSD's or similar to the 18" CS7's? Rubbing is my concern based on the rim widths and offsets... without rolling fenders and running negative camber - very tight squeeze, no?

BTW, 225 front, 245 rear works for me.

[AW128i]

From what I've read, because the CS7s come in a 1-series-specific fitment and are designed to have 225/40 front and 255/35 rear tires, they aren't a problem with anything that factory tire sizes accommodate. That is, if factory tire sizes aren't a problem with the suspension bits you mentioned, then the CS7s in the aforementioned tire sizes shouldn't be problematic, either.