I just picked up set of Prowedges 22x11x8. All I can find are 8x8's in douglas blue labels on rockymountain. I know I've seen some wider 8" wheels, like 8x9 or 8x10's. Anybody know what sizes are available and where to get them? I've checked at my local bike shop and they said to check douglas's site and get them a part number, but all the Douglas site has is product lines. I didn't see sizes.