| Four links permit simultaneous movement in two directions. Greater flexibility for added comfort. Additional benefits include easier mounting, security in motion and relief of tension in hips, knees, ankles and calves. Special treads adapt to foot, ensuring permanent contact with stirrup. Sizes 4 1/4", 4 3/4", 5 1/4". Note: due to rubber covering, stirrup is 1/4" smaller than size given. |