Okay, been doing some research on running a 180/55 on the back of the R1 vs. the 190/50 it comes with stock. I'm thinking about it from a financial aspect AND I read the 180 makes it more nimble, yet theoretically wouldn't that mean less contact patch? (also heard they come with that size for reason :blahblah:) Anyone here running a liter bike (or equivalent tire size) have any experience with this? pros? cons? Any advice would be appreciated very much :biggrin: thanks.