The Extreme model, for Strong Athletes and/or heavy people.
KJ Pro7, can return up to double the energy compared to the standard XR series models for the general public. It includes the versatile T-Springs TS-Pro7 plus 2 steel coil springs, which can optionally be added on the T-Spring, to make the spring system even harder to compress. The KJ Pro7 incorporates all the latest patented technology and is the most effective, efficient and versatile product available in its category.
T-Springs have to be changed every 60-80 working hours. Store the boots away from direct sun light and/or heating systems, avoid damp storage areas. Multi-sized liners are machine washable at 30*C, leave them to air dry. Clean the boots on a regular basis, remove stones/sand/grass from and in between shells and soles. Time to time check the bolts on the upper shells, if they have become loose, gently tighten with Allen key no.5.