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Bridgestone launches improved bike radials – front and rear

GETTING TO GRIPS: Bridgestone has topped its S21 radials with a new S22. Image: Bridgestone Tyres

BRIDGESTONE has launched one front and five rear Battlax Hypersport S22 radial sport tyres for street use. They’re already being distributed in North America and will reach other markets during February 2019.

The range follows the S21 – original equipment on a number of sport motorcycles – and has been a popular replacement choice for many riders.

Bridgestone says the new rubber has better dry grip and ”sufficient” wet performance and these are the wheel sizes:

120/70ZR17M/C (58W)
160/60ZR17M/C (69W)
180/55ZR17M/C (73W)
190/50ZR17M/C (73W)
190/55ZR17M/C (75W)
200/55ZR17M/C (78W)

Bridgestone told The Corner ina a media release that ”technical highlights” include a new tread pattern for more cornering grip in rain and ”optimised pattern rigidity”.

There’s also an optimised resin component in a new rubber compound that, Battlax says, ”function across a wide range of temperatures – include very cold”. The result, the tyremaker says, is better grip on a dry road.


The centre tread on rear tyres includes silica particles smaller than those in conventional tyres to increase the area of the silica in the contact patch.

The result, Battlax says, is better wet grip.

The S22 also includes the brand’s Ultimat Eye – claimed to measure and visualise the behaviour of tyre contact patches.


It’s tech also used on tyres destined for the FIM Endurance World championship.

Bridgestone sys it has reduced the slippage area in the rear part of the tyre’s contact patch in comparison to the S21 to contribute to better grip and light handling.

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