not sure if this will help, but on my staggered 19s, there are 5 segments on the tire seperated by 4 channels. the second section from the middle of the car has curved channels in it that channels water from the inside wall towards the middle channel. or looking at it from the cars perspective... from the front middle of the car diagonally towards the outer rear. the channels in the second section are deeper than the ones in forth (outer) section. does that make any sense? now you got me wondering if they installed my tires correctly???