The pneumatic tires on 494, 70, (and of course 469 on Einstein this year)were from MBS Mountainboards. They were an 8" knobby black rubber tube tire with a glass filled nylon hub. They are intended to be used on, get this, mountain boards.
We've used the same tires / hubs several years and never had a flat or a broken hub. I think these are far superior to any wheel/tire made for FIRST robots. Of course the tread will wear down, but we've been able to get through a season before we've completely destroyed a set.
MBS is located in Colorado Spring, CO. They have fair prices and good delivery. You'll see on their website a beautiful looking set of 6061-T6 aluminum hubs. I think this is what the fashionable robots will be wearing this season. Be a sport and wait till I order mine so they don't run out
http://www.mbs.com/
Jay