I use the the Silica version which has a much softer silica compound. Actually a supermoto racing tire, they offer this one as a winter tire. Front 110/17 rear 130/70 on a 3,5" rim in my case but you can put it on the 4" rim where it will quite flat a probably even better as a winter tire. I ride mine hard on twisty roads all year round, they are really great in the rain. The soft compound wears out fast of course; you can't have everything.