I think its a 20" K2, its the large size, I like my frames a touch on the small side. I'm 6-2 and 230lbs I also have a 56cm cannondale road frame with a really long seatpost and really really tall stem
the bike I am on in my avatar is my roomates minibike, I think its a 10" sad thing is he fits on this better than a real motorcycle, I, as is obvious in the picture, dont fit and cant turn, which has led to many driveway crashes