I'm looking at buying an S-12 rear for my Cr250. Currently the bike has a Dunlop 756 sized 120-19-19. My problem is that I can not find the Michelin equivelant of that size. I found a chart at http://www.motorcyclemart.com/tires/michelin/cross12.htm and they don't even show 120-90-19. It seems that it would be an 140-70-19 but no online sites show it. Does anyone know if this tire is availible in the size I am looking for?