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      03-21-2019, 05:18 PM   #99
Roundown
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Quote:
Originally Posted by Max Well View Post
Quote:
Originally Posted by Roundown View Post
I don't really get the desire for a CFRP roof. It's such a "no-compromises" performance enhancement given the cost/benefit. On an SUV, the entire platform is "compromised", by design. It's a big, fast, family hauler. Just seems like an odd item for folks to focus on. ... No one will take an X3M to 11/10ths where the marginal reduction in center of gravity or weight will be noticed.


Same song, over and over and over...

If you are a Specialist in Fluid Dynamics and Automotive Engineering I apologize in advance for the following. But if not - the sophomoric, assuming comments continue...

"Cost/Benefit ratio" is a subjective measure with performance vehicles, right? We're not discussing analyzing the costs of diagnostic study X and how it may affect mortality rates long-term vs less costly modality Y. You have no validation in stating 'No one' will be able to appreciate the reduction of 125 lbs off the roof of a tall SUV platform. Again, if you are in the Field, apologies, but share your data as I'm interested in seeing it if you are (honestly). I'm just a lay person without a background in this, but I have tried to understand how a CFRP roof could improve dynamics in these tall SUV constructs. https://x3.xbimmers.com/forums/showthread.php?t=1564722 . I may be way off base on my attempt to understand, but the background is there.

Why does someone buy a Urus, or a Trofeo, or the soon-arriving DBX (and at twice to three times the cost of our X3M Comp)? Why is the high-performance SUV class the one Mnfrs are now banking on for bringing in the profits so the smaller coupes and sedans can reap the benefits for further research? Per your mindset, just misguided souls who have money to spend and don't know what to do with it. Or could it be that some enjoy the pursuit of performance in a vehicle platform they need for their family or athletic outdoor activities? Suspect the counter is to say all of us should buy a stable of vehicles for each activity? Perhaps an ideal, but not all of us can accomplish that.

So yeah, I want a utilitarian vehicle that represents the pinnacle of performance 'for the platform I need'. I don't see why this is so difficult for some to conceptualize.
I think all the SUVs you mentioned have pano roofs.

To each his own - clearly - but the entire genre is a desired and clear compromise.

I owned an F85 X5M, enjoyed the pano roof and never, not once, did I think "man I wish BMW would have dropped it to save 150lb on my multi-ton SUV".

I get the sense that the same people that want this roof are almost equally likely to option the largest, heaviest wheels BMW will offer them - unsprung weight be damned.
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