My question is not so special or complicated that it needs someone professional in order to solve it,but the professional members,i believe,may know the answer.
Anyway,I believe that there is someone in this forum that familiar with 27X1-1/4 tyre and know what should be the right width of the belt to my tyre size.
I assume that like at any other forum,there are some members here,that considered as the expert in that area and my question is directed to them.

Thanks in advance.