The Sprenger System 4 Stirrup is the only stirrup, which pivots in 4 directions: backwards, forwards and to each side. This improved flexibility relieves tension in the rider´s hips, knees, ankles and calves and in softening the impact on cartilage and ligaments like no copy can do. Available in sizes 11 cm (4.1/4 inch), 12 cm (4.3/4 inch) and 13 cm (5.1/8 inch). Sprenger item no. 44236. Text by CALEVO.Sprenger