Shinko 705 in a 4.10 X 18 and a 110/80 -19. I did not research size changeover but the 705 may work very well for you if it'll fit.
Beware those with no sense of humor as they will cause you misery.
Disclaimer: I am only responsible for what I said, not what you understood or how you interpreted my words!!
'11 GSA supertanker/mothership, '11 R1200R (for sale), '11 Suzuki Burgman 400, '06 KTM 640A