FYI. I needed a front tire while on a trip in Canada. The only tire available in stock was a Dunlop "Harley Davidson" tire which happened to be biased and not radial. Also, slightly different in size; 100/90-19 versus stock size of 110/80R-19. I determined new tread was better than no tread so I bought the tire. After 11,898 miles, I'm now replacing the tire with a radial and correct size. However, having heard for years not to mix to bias and radial tires I want to share, in this case and with this particular combination, the bike handled fine. Consequently, if you are ever in need of a front tire while out on a trip, check the HD dealer as I was told this is a popular size.