1190 tire size
So the standard bike looks like it uses a 120/70-19" tire. The R model is a 21" front (with 2.5" wide rim?). What size tire in on the 21" rim?
I have the Conti TrailAttack 90/90-21 on my 990. It's a bit skinny for a 500lb bike. I'll get around to getting a 19" front wheel but in the mean time it'd be nice if there were a wider 21" tire to put on my 990.