Maxxis colossus fat mtb tyrethe maxxis colossus is a fat tyre designed specifically for use in wintery conditions the treadpattern is widely spaced to clear out packed snow efficiently to maintain traction while the tall knobs cut through the snow and grip the terrain underneath the maxxis colossus tyre is made using a special rubber compound that remains pliable even in the coldest conditions ensuring maximum grip features snow specific tread pattern conditions medium loose wet mud corn