MM, don't lie to Steve like that!! Everyone knows that is the new secret used rear tire rubber dispersion device. It collects the spent rubber from the slicks, combines it in the mixing chamber and expells it right on the wheelie bar wheel. Thus giving it maximum traction when wheelie bar thrust is engaged.
Steve I am sorry my buddy MM was trying to mislead you, but what can I say about the NFC crewguys.
Rapid {you can't make this stuff up at home kids}
PS, it is a great shot Steve.