You can. It was actualy my sly attempt to slip it in this thread as I have one up for sale. Its an original F800GS hub that has been laced to a 19" rim. I havent seen one in the flesh, I have seen a 17" motard version. Woody's wheelworks indicated the 19" would make the bike more road worthy than dirt worthy (hence similar to the 650twin), and lower the bike around 3/4" in the seat. Woodys has done a few 19" rims from what I hear laced to the original hub, mine hub came off a used bike. I decided Im going to stick with the 21" so no longer need the 19" (never fitted).