The forum has a lot of great ideas when it comes to substituting the Vex VersaHubs used with the 3" & 4" Flex wheels but has anyone found a way to mount the 1.625" & 2" wheels that require the 1/2" VersaHex Adapters?
Could experiment with jamming various gears, sprockets and things into the .5" hole and see if anything fits well enough. maybe something like a 6t sprocket with chain wrapped around could work?
Cleaner way to do it would probably be to make some polycarbonate discs that sandwich the wheel, and have standoffs running through the spokes but that would be a lot of effort and might take out more compression from the wheel then desired.