News and Announcements

Your favorite corner will look completely different

The S20 EVO loved by so many riders has evolved again. Due to its superior agility, the S21’s ease of handling and the contact feel when cornering surpass even that of the S20 EVO. The rear tire was developed with Bridgestone’s ULTIMAT EYETM technology, while the compound succeeds in generating better traction and while improving abrasion resistance for longer life. This marks the birth of a new premium sports radial, one that brings out the best in machine performance in pursuit of the joy of riding.

Recommended for:
● Riders who mostly enjoy sports riding
● Riders of supersports motorcycles who want a combination of performance in the wet and long life
● Riders who are thinking of starting riding on the racetrack

• Bridgestone’s proprietary tire development technology for measuring and visualizing tire contact surface behavior during actual riding conditions. Previously, tire development consisted of running simulations, building prototypes and using laboratory measurements as well as actual vehicle tests to verify performance.
• ULTIMAT EYE™ reproduces highspeed riding conditions in the laboratory that are equivalent to those of an actual vehicle, enabling tire contact surface behavior to be visualized. In addition to the previous actual vehicle tests, this allows high-precision analysis and performance verification with a solid scientific basis. The measurement and analysis equipment can handlespeeds of up to 400km/h and lean angles of up to 60 degrees.
  
  
  
• BATTLAX HYPERSPORT S21　[ Front ] Tire SizeStandard Rim
  （inch）Appr. Rim
  （inch）OD
  （mm）TW
  （mm）Remarks 130/70 ZR 16 M/C (61W) TL 3.50 3.50～4.00 589 128   110/70 ZR 17 M/C (54W) TL 3.00 2.75～3.50 592 110   120/60 ZR 17 M/C (55W) TL 3.50 3.00～3.50 583 119   120/70 ZR 17 M/C (58W) TL 3.50 3.00～3.50 601 119   ON ROAD ＞ SPORTS BATTLAX HYPERSPORT S21　[ Rear ] Tire SizeStandard Rim
  （inch）Appr. Rim
  （inch）OD
  （mm）TW
  （mm）Remarks 150/60 ZR 17 M/C (66W) TL 4.00 4.00～4.50 619 154   160/60 ZR 17 M/C (69W) TL 4.50 4.50～5.00 632 165   180/55 ZR 17 M/C (73W) TL 5.50 5.50～6.00 629 184   190/50 ZR 17 M/C (73W) TL 6.00 5.50～6.00 633 190   190/55 ZR 17 M/C (75W) TL 6.00 5.50～6.00 650 194   200/55 ZR 17 M/C (78W) TL 6.25 6.00～6.50 657 200
• Source: http://www.bridgestone.com/products/motorcycle_tires/products/detail/pr138/