The S21 is A mix of proven wet technology and radical new features that take dry performance to a whole new level. From Bridgestone's Website.
Bridgestone S21 120/70ZR17 (58W) & 190/50ZR17 (73W) Motorcycle Tyre Pair
Bridgestone S21 130/70 ZR16 (61W) & 180/55ZR17 (73W) Motorcycle Tyre Pair
Bridgestone S21 180/55ZR17 (73W) Rear Motorcycle Tyre
Bridgestone S21 120/70ZR17 (58W) & 180/55ZR17 (73W) Motorcycle Tyre Pair
