Presentation packaging, 11 and 13 tooth sprocket made of High Tensile steel, Shimano HG compatible, incl. aluminum lockring, black The abbreviation HT stands for High Torque With the "Grad.HT" cassette sprocket interchangeable set, you can replace the sprockets of the CONTEC cassettes of the same name. The set consists of an aluminum lockring and an 11-tooth and a 13-tooth High Tensile steel sprocket. When choosing, pay attention to the compatibility with the respective cassette variant. Number of teeth 11, 13 Large sprocket 13 inch Main color black Small sprocket 11 inch Spider construction Cassette mounting System compatibility 11-speed Type/kind Article Replaceable sprocket partial