I put a 90/90 19 roadrider on the front laced on a wm2 rim
I put a 110/80 18 roadrider on the rear laced onto a wm3 rim
The setup seems to work OK, I have lowered the bike 1.5'' also...
If anything the steering feels abit lazy, maybe tending to be a bit slow into the corners. Straight line stability is good.
I would give the tyres a thumbs up for all round use.
I put the same roadrider tyres on my Triton, and would have to say the Avon supervenoms were better there, Much sharper response, but not much life out of the rear tyre...