ya can purchase spools from TowerHobbies or other HS. The handling characteristics are surpurb more or less like a posi trac in a 1:1 car. Both of the rear wheels rotate same speed going straight or in a corner heres the link for the spool from Tower:
http://www2.towerhobbies.com/cgi-bin...?&I=LXSP76&P=7