Tires: types of tyres, bias ply tires, radial tyre

Question
what is the main difference between a radial and nonraial tyre? why and when should one prefer a radial tyre? What are its advantages?//

Answer
Radial tires are worlds beyond bias ply tires.  In radial tires, the steel chords are placed in a criss-cross pattern.  Whereas bias ply tires are placed flat across the face of the tire.  Bias ply tires are much, much harder for the engine to turn and are much harder for the suspension to compensate for.  Bias ply tires are almost no longer used.  That goes for America at least.  Judging from your spelling of the word "tyre" you are probably located somewhere in Europe would be my guess.  I am not aware of the availability of radial or bias ply tires in your area, but I would imagine that it is not much different than over here.  I hope this answers your question.  Any follow-ups are welcome.