IROC GTA Space saver spares

I thought these looked kinda cool for a gasser or Tony Nancy roadster look. anybody know anything about them? How rare? How strong? what size tire could be used?

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2441461508&category=42614

 

I believe that the LE-1 kit is a "trunk kit" for road racing/Auto crossing. Fairly rare but findable

 

I've got one of them things! The rim is a ........running to the shed to measure..............15 x 6, damn it's cold outside! They are a light wheel and pretty neat looking. Would be cool for a gasser.

 

That's a sharp looking wheel.Too bad it's the wrong bolt pattern.