Shoe flex tester power source: electric flexing frequency: 200cycles/minute maximum eccentricity: 80 mm maximum angle of flexing of the shoe:35degree simultaneously: two motors: hp single-phase 230 volts ac counter: six- digit electronic counter the shoe flex tester is used for the determination ofthe ability of the full shoe to withstand the effect of flexing stresses produced on the different parts of the shoe. Although the various parts like uppers and soles of a shoe are tested separately for flexing endurance with the help of a pleximeter and ross flex tester, the shoe flex tester gives results which are more related to the actual performance of the shoe as a whole.