[Joe Johnson]

I remain a big fan of pneumatic tires.

First I like that they come with a small amount of suspension baked in.

But the main reason I like them is that there are versions that are just amazing in terms of gripping the carpet -- it has been years, but I think that there was some data publically available that showed that they were better than the rough top conveyor belt at gripping the carpet (especially if there are uneven surfaces involved).

There are 8" "mountain board" wheels (also used on wheel chairs) that I liked a lot.

But... ...I am admittedly old school on this front.

Joe J.