[stoinkythepig]

I've tried both on my 9R, a few times and with quite a few brands. I like the 190 in the tires I'm currently using (Road Attacks). That said, there's far more difference between a worn tire and a new tire of the same size/brand than there is between the 180 and 190. I also found that increasing the rear ride height with 6 mm of spacers on the shock made a much bigger/better handling difference than tire size.