Rubber reinforcing material with reduced weight, method of preparing the same, and tire comprising the same

A method for preparing the rubber reinforcing material comprising steps of:

• preparing a fiber base woven at the warp yarn density of 55/inch to 65/inch, using warp yarn, which is a single-ply yarn having fineness of 420 denier to 800 denier, and weft yarn having dry heat shrinkage of −1.0% to +3.0% according to the standard test method of ASTM D 885 (177° C., 2 minutes, load of 0.05 g/de);
• forming an adhesive layer on the fiber base;
• and
• applying a rubber coating solution on the adhesive layer and heat treating to form a rubber compound layer on the adhesive layer.