I want to warn people NOT to purchase the Bridgestone S20 tires. They are terrible. I ended up crashing my brand new BMW S1000RR b/c of these tires. They are not at all confidence inspiring, feels vague, extremely slow to warm up, doesn't give adequate feed back before they slide and are totally unpredictable. I would not recommend these tires for a bike over 250cc and wouldn't try to drag knee with these tires, especially if you're an aggressive street rider or ride canyons don't take chances with your life by trusting these tires. They are absolutely terrible. I was running 32f/34r cold tire pressures and after good 15 minutes of riding, I stopped my bike to feel the tires and they still felt cold with atmospheric temp around 75F. When I had my Metzler K3 racetek tires, I could literally pull out of my garage, ride one block to an intersection and drag my knee making a left turn. Bridgestone S20s felt unplanted whether you're upright or leaned over. I would not recommend these tires to anyone. Pirelli supercorsa diablo SP, Metzler K3, or Dunlop Q2's are much much better than these POS Bridgestone tires.
Now I have damage of over $4000 on my brand new bike b/c of these stupid tires. And yes, I broke them in slowly, leaning gradually riding easy for about 300 miles. While making a right turn, leaned to about 1/2" from the edge of the tire, it just decide to slide out as if I were riding on ice. The sh1t just kept sliding until I lost control of the bike. I didn't grab the front brake, I didn't chop the throttle or pinned it. Just held it steady and gradually leaned to make the turn and it just gave out on me unpredictably.
Bridgestone S20 sucks a$$ and I swear I will never buy another tire from bridgestone again. Becareful out there people and please do not buy these tires. Get Dunlop Q2s or pirelli's if you want amazing grip. And F' that ET looking ugly a$$ Rossi doing fake commercials for the bridgestone S20. Don't believe the hype.