you might have to go up to 150 in the rear, its worked well for me with the alphas. When I started the season, I had a set of brand new q3's that I never mounted on my sv 650 before I sold it, 120/160.....they fit, but they were pinched on the rim a little too much. Switched to the alphas and it made a world of difference
A 140 definitely exists for the Supercorsa rear. Richard had a set put on his Honda CBR 250 at Shannonville.