Wheels ?

[Ocracoke]

Depends on how you plan to drive the 6 wheels I think. If a miniature gear system could be used, then I can't see why it couldn't work.

The biggest weight component I found on my antweight Osu was the battery and speed controller though to be fair, the battery was a LiFePO4 and the speed controller was a Sabretooth and there are much lighter alternatives/combinations out there.

The weight of 6 25mm wheels from Nuts and Bolts (nutsandbolts.co.uk) is only 18 grams so I wouldn't worry too much. I used some foam wheels and drilled out some weight saving holds into them with my trusty Dremel.