cogy.netMay 24, 20201 minTyres need good pressureIf you feel steering is harder than usual, tyre may be getting flat. There are 3 sizes in COGY line-up, L M S. Each model has 3 inflated...
cogy.netMay 24, 20201 minDifference between WITH and WITHOUT differential gearWhat is differential gear? https://www.youtube.com/watch?v=yYAw79386WI&t=1m50s This video explains all. On COGY or Profhand, if the unit...