Now there's two parts to this; full aero (and ideally directional!) wheels, or regular fin/mesh wheels with optional aero covers.
I just love idea of designing a wheel, then to almost completely cover it with a over-sized hubcap. Its the unnecessary detail like a popup headlight, that is nothing but extra effort. Awesome stuff..
The beautiful gold mesh on the Hayashi Techno R above had the option of being hidden away by a full cover...!
Originally, and in theory, the whole idea was totally functional - to channel air though the brakes; with wheel and cover setups as seen on things like a 935 Porsche or DR30 Skyline Silhouette..:
It then became more of a styling feature. Regardless of how functional some may seem, remember these are for road cars - brake temps between traffic lights on the way to work really aren't much of an issue..!
There were ones done by OEM's like Nissan, as used on the R31 Nissan Skyline Silhouette (1986 though 1990)..
..used on the standard finned 15x6" alloys..
..And Mugen (Honda) for the CF-48:
Then there are the range of aftermarket ones, such as the ones on the Hayashi Techno R mentioned above..
From Heroes Racing, to suit the CX-2 Fin and Mesh:
(link to more of the above picture sets here, and here)
(link to more of the above picture set here)
From Impul, for the Hoshino Racing Pro-Mesh wheels:
The pro-mesh, with and without covers.
(more of the above hilarity here!)
From Work; these incredibly rare covers to suit the E-wing range..:
(pictures courtesy of skidmarks wheel and tire)
how about these relatively simple ones, marked Racing Saucer!
if anyone has more info on these, let me know!
From BBS were these fantastic mesh styled ones..
Styled to very closely imitate the ones used on period BBS racing wheels..
Ahh. So great..
From Enkei, the Aero Bortex M5 / M5F..
From Rays Engineering / Volk Racing - for the Artisan Spirit Fins:
Unsure of significance of the '370' marked on the version above.
The covers to suit the smaller diameter faces used screws through the front of the face for mounting, rather than from the back.
The high-offet 'FF' covers above also have really neat fastener-clearance cutouts in every fin..
Tiny Kei version above. It didnt get much smaller than this!
Rays Engineering / Volk Racing C1..
The Carbon overlay on the aluminium face is pretty on its own; but the (very) rare aero trim pieces give it a completely different look.. and like the wheel faces, are properly directional. Dont lose one..
Also from Rays Engineering / Volk Racing; were the covers to suit the 84C wheel...
(More or the above picture set here)
These interestingly happen to look VERY similar to the SSR EX-C ones below. Would love to know more about this..
From SSR, to suit the EX-C fin and mesh.
Like the Volk 84C covers; theres multiple pieces, colours, great lettering, the small text around.. argh.. all good things. Unlike the Volk 84C covers however, I dont own a set.. and really, really want to fix that! ha
..or perhaps white with red (note the lower offset style centre)
Both white and red covers were available with either black or red text.
Like Rays Engineering, these also weren't the only aero covers Speed Star made.
There were also these VERY rare covers for the SSR Aero / Development:
..which happen to be the only complete set I've ever seen.
Better than that though, are the covers used on the SSR Starsorb wheels.
The Honeycoque..
..and what is perhaps known as the Fushimi..
Both are incredibly rare, and on likely one of the most technically-interesting wheels ever made. Seriously.. wow.
Dont have some fancy alloys with optional covers though? Well how about some period generic ones..
Dont have alloys? how about these Hella ones to pop on your steel wheels!
Pulls off the look surprisingly well - and not the only style Hella did either..!
There were also a couple different wheels in this era that had small aero extensions to the face, such as the ZONE ARX below..
..there seriously should have been more transparent covers made..
More of the Zone's above here.
ANYWAY..
Full sets of the aftermarket aero covers are now extremely hard to find, and I rarely see them for sale in any condition. 20+ years on, its not hard to understand that most would be damaged, lost, or even thrown away as they fell out of fashion. The search is worth it though.. my wheels feel incomplete without them.. :(
Thats it for pictures on this one anyway! At least now I can admire them all in one place.. :)
http://www.imadeskidmarks.com/index.html
http://www.charlescharlescharles.com/contact/index.htm
http://honda-tech.com/showthread.php?t=1130174
http://infinitwheels.com/
http://www.importtuner.com/wtg/impp_1105_old_school_vintage_wheels/
http://www.icbmotorsport.com/
done! (that took a while..!)
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Edit, December 2014.
Just spent another couple hours editing this post.. adding another 70 (!!) pictures I've collected over the last 18months. So sorry if it jumps around a bit when reading.. I'm bloody tired..
Thanks again to anyone who originally took any of the pictures above.
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Edit, January 2018.
Added Enkei Aero Bortex M5/M5F pictures.
I've actually come across many others over the last few years - unfortunately I've just left it to the point sorting and adding them to this would be one helluva task..! I'll get to it eventually..