12 with a series of spaced apart axially or longitudinally extending ribs or ridges 14 preferably the ridges are equally spaced apart around the circumference of the body 12 of the string preferably the string 10 including the ridges 14 is made as a single extrusion the material of the string 10 may be a pet based polymer but any other form of string heretofore used for tennis racquet strings may be used as well fig1 b is a direct cross sectional illustration of the string 10 having the central body 12 and the series of distinct rectangular ribs or ridges 14 in this fig1 b the ribs or ridges are formed as relatively small rectangular protrusions that extend perpendicularly from surface of the cylindrical central body 12 in another embodiment of the present invention fig2 illustrates in cross section a string 20 having a central body 22 and a series of ridges 26 six ridges are illustrated thus the center points of each ridge would be spaced 60 degrees apart from one another measured radially around the circumference of the central body 22 in fig2 the ridges 26 are formed as truncated triangles whose bases completely cover the smoothly curved surface of the central body 22 in another embodiment of the present invention fig3 illustrates in cross section a string 30 having a central body 32 and a series of ridges 38 six equally spaced ridges are illustrated and thus the ridges would be spaced 60 degrees apart from one another.