A wheel that's available thru Sig that many may not know about are these Kavan jobbies imported from Germany. They have two styles, one with a chrome hub a lot like the old Du-Bro's, and a Military spoked style in a silver-grey that looks kind of like a P-51 Mustang wheel. The bonus of these great looking wheels is that they are SUPER light but still have a harder rubber outer casing on the tire, not foam so they won't soak up fuel.

I wager that the lightest wheels available are the Brodak offerings....

Sparky,

 I don't have a scale, but they are pretty darn/dang/friggin'/stinkin' light.

 They feel at least as light the Du-Bro or Brodak foamies.

 I've got some of the foam Brodak wheels too, and yes, they are nice as well, but can still soak up fuel.