"19 inch wheels to 18 inch my experience"

z4mroadster said:
gwatson said:
Just added up that I could save 13.8kg by fitting the following wheels

APEX-EC7 8.5 ET38
APEX-EC7 9.5 ET35

The ARC-8's with the same width\offset would save 17.78kg!! :o :o

That's a significant weight saving, plus the fact it's unsprung weight too!

Please post more pictures once you get the centre caps in this weekend :thumbsup: :thumbsup: :thumbsup:
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I will do as soon as there on, those weight savings are huge ,17.7kg is a significant reduction in weight when it comes to performance,and according to the unsprung weight calculation that would be a saving of around 234lbs inside the car, that's like losing an extra passenger!!! :thumbsup:
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centre caps on :)
 
having spent all my time on 18s now instead of just on a smooth track I'm really enjoying the transition from 19" too.... my track biased suspension is even feeling more comfortable with that thicker sidewall. i will never put a 19" wheel on this car again. EVER. For purely looks however, 19s can really be beaten.
 
Beedub said:
having spent all my time on 18s now instead of just on a smooth track I'm really enjoying the transition from 19" too.... my track biased suspension is even feeling more comfortable with that thicker sidewall. i will never put a 19" wheel on this car again. EVER. For purely looks however, 19s can really be beaten.
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Chunky 18's definitely the way to go :thumbsup: especially on the Roadster
 
Beedub said:
having spent all my time on 18s now instead of just on a smooth track I'm really enjoying the transition from 19" too.... my track biased suspension is even feeling more comfortable with that thicker sidewall. i will never put a 19" wheel on this car again. EVER. For purely looks however, 19s can really be beaten.
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Agreed, ill never go back again either, the cars overall performance is so much better and cant fault the way it looks also. I think with high performance cars theirs reasons why the manufacturers used the specs they did etc. although I'm not knocking anybody for customising their cars...to each his own. :thumbsup:
 
Looks great!

I recently made a similar call by removing my BBS CH P-Zero Square set-up and going back to the stockers ... this time in Graphite Metallic with matte clear and stock size Conti tires. I added 15mm front and 12mm rear H&R Spacers to fatten it up a bit!

PS: yesterday my Z4M-R met its brother from a different ....!

2017-5 Z4M-R front-side TFF small.jpg
2017-6 Z4M-R Bros small.jpg
 
[ref]z4mroadster[/ref], your experience with the 18 vs 19 inch is pretty much what many other ///M owners who have driven both have experienced. I have been tempted a few times over the years to move to 19's but after driving an ///M once with 19's I gave the idea up. Besides the issues you raised I was concerned about potholes which are numerous in Pennsylvania and I have already broken one spring on them and damage a wheel.
 
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