Streamline track system with carriers and rail

A track system comprising:

• a guide rail having a pair of opposed parallel guide sides and a pair of opposed parallel set sides, each of said guide sides provided with a pair of parallel plain lanes and a parallel V edge protruded between said pair of parallel plain lanes, said V edge having a top portion and a base portion;
• at least one carrier adapted to be run along said guide rail and comprising a frame and a plurality of roller assemblies rigidly secured to said frame for supporting said at least one carrier by engaging with said opposed parallel guide sides, each of said roller assemblies comprising a journal and a pair of ball bearings mounted on said journal with a space between said pair of ball bearings;
• and
• each of said pair of ball bearings including an outer race which engages with each of said pair of parallel plane lanes and which has a beveled corner facing to said V edge, each of said pair of ball bearings adapted to cooperate with said V edge such that said beveled corner engages with said base portion of said V edge and such that said top portion of said V edge remains in said space between said pair of ball bearings without engaging said outer race.