Trivia note: with the factory chain I was unable to use a rear sprocket with one extra tooth (42). Ran out of forward adjustment by ~1mm. I was hoping to try it before swapping the new D.I.D. chain on. The Pirelli is quite a bit bigger and you can feel it in the gearing. I doubt one tooth will make much difference, just a step in the right direction. Probably order a 44.