Wet performance has improved with "Pulse Groove Technology". The stability and wear resistance required for long touring have also improved Tread pattern design more effectively evacuates water, and silica rich compounds provide confidence in wet weather conditions Specific GT spec for heavier bikes provides additional stability and 10% more wear life Comparison based on Battlax T32 versus Bridgestone Battlax T31 tire from internal testing. Results may vary.. TIRE T32R 180/55ZR17 73W