Why do all modern cars have slab-sided wheel wells?

Kinja'd!!! "Jake - Has Bad Luck So You Don't Have To" (murdersofa)
02/16/2018 at 14:43 • Filed to: None

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Something I’ve noticed that is present in pretty much every modern car. Look at the F-type above. Now get your hand out of your pants. Around the wheel wells there is perfectly flat sheet metal for about 1.25-1.5" around the whole wheel well. Contrast with this old gen1 XK8

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The wheel wells are just... there. No embellishments, just a break in the bodywork for the wheel. Why is this? Why is it so prevalent these days? Aero? Safety requirements?


DISCUSSION (23)


Kinja'd!!! Rustholes-Are-Weight-Reduction > Jake - Has Bad Luck So You Don't Have To
02/16/2018 at 14:48

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Aero, I couldn’t explain it more, but it’s Aero, so I just consider it’s magic


Kinja'd!!! Future next gen S2000 owner > Rustholes-Are-Weight-Reduction
02/16/2018 at 14:49

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This.


Kinja'd!!! chaozbandit > Jake - Has Bad Luck So You Don't Have To
02/16/2018 at 14:50

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Something something regulations state wheels cant extend beyond the outermost point of the body something


Kinja'd!!! Dasupersprint - base trim is enough > Jake - Has Bad Luck So You Don't Have To
02/16/2018 at 14:51

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It may be structurally stiffer too? I like it more than the unfinished ones


Kinja'd!!! OPPOsaurus WRX > Jake - Has Bad Luck So You Don't Have To
02/16/2018 at 14:54

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i think i asked this same question a very long time ago and was pretty much told areo.


Kinja'd!!! Urambo Tauro > chaozbandit
02/16/2018 at 14:58

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Hm, that would help define where exactly the edge of the body is, without having to find the outermost point of a curve.


Kinja'd!!! McMike > Jake - Has Bad Luck So You Don't Have To
02/16/2018 at 15:06

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What’s more interesting is that I first started noticing them in mid-00s Nissans.


Kinja'd!!! Chan - Mid-engine with cabin fever > Jake - Has Bad Luck So You Don't Have To
02/16/2018 at 15:07

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The OG XK8, still the best-looking one.


Kinja'd!!! For Sweden > Rustholes-Are-Weight-Reduction
02/16/2018 at 15:08

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You put smoke in a wind tunnel and magic happens


Kinja'd!!! cluelessk > Jake - Has Bad Luck So You Don't Have To
02/16/2018 at 15:08

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Work in body shop as a body tech.

The body line adds strength the wheel opening body line. Without the body line the wheel opening bend needs to sharper than 90 degrees. Makes attaching splash shields more difficult and harder to make a sharp body line on the actual wheel opening. It looks less premium.

I also think it tricks you eyes to make the wheels look larger.


Kinja'd!!! RT > Jake - Has Bad Luck So You Don't Have To
02/16/2018 at 15:11

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It’s obviously not for aesthetic purposes because it looks a bit naff.

Consider it to be aero magic.


Kinja'd!!! Arrivederci > OPPOsaurus WRX
02/16/2018 at 15:20

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areo speedwagon?


Kinja'd!!! Ash78, voting early and often > Jake - Has Bad Luck So You Don't Have To
02/16/2018 at 15:38

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The Europeans started this in the 90s and I’ve slowly watched it become the norm everywhere.

Beyond the aero, stylistically I think it creates a more finished look to the car, but when you use any design element too much, it seems lazy.


Kinja'd!!! RamblinRover Luxury-Yacht > cluelessk
02/16/2018 at 15:43

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Structurally/stylingwise similar in most respects to the ancient pre-splash shield days of the ‘50s-’80s and having a raised/creased lip around the opening, one would assume. And less bad for aero.

One of the first cars I’m aware of to abandon the raised lip was the Ford Falcon:

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...which has one in the body fillet over the front wheels, but nowhere else.


Kinja'd!!! MarquetteLa > Jake - Has Bad Luck So You Don't Have To
02/16/2018 at 15:51

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I’d assume it’s for reducing drag, which increases fuel efficiency.


Kinja'd!!! dannyzabolotny > Jake - Has Bad Luck So You Don't Have To
02/16/2018 at 16:13

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Man, that first-gen XK8 looks amazing, even to this day. Not a big fan of the new one.

Also, why did manufacturers all switch to using positive-offset stock wheels with zero lip/dish? I hate that. I love wheels with a big lip on them, like the ones on my 540it:

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Kinja'd!!! Liam Farrell > Jake - Has Bad Luck So You Don't Have To
02/16/2018 at 18:20

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Which categorydoes my Land Rover fit in?


Kinja'd!!! Jake - Has Bad Luck So You Don't Have To > Liam Farrell
02/16/2018 at 18:47

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Yes.


Kinja'd!!! gmporschenut also a fan of hondas > Jake - Has Bad Luck So You Don't Have To
02/16/2018 at 20:30

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i would guess maximising width for additional safety, and trying to cram cars with more and more features.


Kinja'd!!! PS9 > Jake - Has Bad Luck So You Don't Have To
02/17/2018 at 11:27

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Now get your hand out of your pants.

No.


Kinja'd!!! MM54 > Jake - Has Bad Luck So You Don't Have To
02/18/2018 at 15:39

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I don’t like it but I think it’s for aerodynamics - got to get those tenths of MPGs for big brother!


Kinja'd!!! e36Jeff now drives a ZHP > Ash78, voting early and often
02/19/2018 at 10:10

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BMW has been up to it since at least 1968. The e3(sedan version of the CS/CSL) and has a flat lip around the wheel well, and that has persisted through the 7-series up to the most recent generation. It looks like it showed up in the 3 series with the e21 in ‘77 and the 5 series with the e28 in ‘82.


Kinja'd!!! Ash78, voting early and often > e36Jeff now drives a ZHP
02/19/2018 at 10:21

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Good call. I was thinking more mainstream, but those ideas all have to come from somewhere. And BMW and/or Merc are usually the originators of everything. (Or they were, at least.)