A methods of improving the functions of footwear sole

A methods of improving the functions of footwear sole, including a ground-engaging part with substantially round shape. The stud and receptacle are adapted to be secured together by a threaded connection comprising a screw-threaded spigot on one of the components adapted to be inserted with rotation into a screw-threaded socket on the other component. A tightening up means of the components is arranged to become inter engaged at least when the spigot is fully inserted into the socket to resist unscrewing of the components. The tightening up means comprises at least one tightening up assembly by counter-clock rotation, the arrangement is deployed around the outside of rear portion of sole such that the replaceable studs create a stable function for the sole. Said assembly further composited with a hollow shape midsole, an excellent energy returned achieved by a compression created from the deformation between said studs and midsole. The torque which created from the inertial force for tightening up the studs w