BRIDGESTONE BATTLAX TOURING T31 REAR 170/60 ZR 17 (72W) TLBattlax T31Touring Increased flexibility of the rubber for better contact feel of the surface. Improved water drainage with balance between deformation and rigidity due to increased Sea Land ratio at shoulder area. Higher camber thrust generated by a larger contact patch. Bigger adhesion and smaller slippage area for improved wet cornering grip and dry handling response. No sacrifice on the proven and outstanding wear life of T31's predecessor.