i had trouble with 3 tubless tires always going flat(with or without tracks) so l decided to put tubes in them all before l went moose htg this fall using my tracks. the right rear tube stem(proper sized tubes) got sheared off 3 times(i only had 2 extra) I carefully turned to ease the torque on that tire(right rear) only that one tire is giving me trouble. can anyone out there help me?? thks