NEW THIS MONTH ! We have 2 versions of our great tire material options ! 1st the traditional soft we all use for most applications . Then 2nd a new firm version for use on some of todays routed tracks ! The new version has been tested by some of todays top racers in KC , IL , NY , IN , CO and CA and they all approve the new version for use. These were run head to head by these racers VS todays top tires and came out at the top !