20" wheels
I just happened to have the bike in my car for transport home from my shop a day or two before and never bothered to take it out...
the seat was goofy and loose because the one it came with (why i bought the bike in the first place) was a perfect Kashimax MX that I robbed mercilessly, i had that one in a box so i tossed it on there... just because. good thing, would have been much worse riding with no seat at all.