Why la? It works
Because, aquaplaning resistance works by water channeling and with less grooves usually worse.
Just like Yokohama db that you used before. Grooves are fine and small so tyres are very quiet but water channeling is bad, that is why I never recommend the new AE-50 to those who loves running fast in the wet.....lol


the next High Performance Challenge (HPC) event at Sepang track on the 30th November 2008 are now open for registration.