i don't know where in Gods' name you come up with this stuff but a rotating motorcycle wheel assembly does NOT generate any "wind" of appreciable measurement. if the tire had blades or paddles on its tread then......you get the picture. and how do i know this to be true? put a cycle.....any cycle.....any tire size or tread pattern in existence.....on a dyno, lash it down, and spool it up to speed. even with the rear wheel rotating at speeds in excess of over 100mph real road speed you can walk behind the bike...put your hand close to the rear of the tire...and it is virtually "dead-air" space directly behind it....no wind generated. what sometimes reads nicely in a tech journal or online jibberish site doesn't typically transfer to real-world facts.