Chainring spider for the Shimano STePS SM-CRE80 and SM-CRE80-B as well as the SM-CRE70 and SM-CRE70-B chainrings of the FC-E8000, FC-E8050 and FC-M8050 crank arms. Adapts chainrings with a 104 mm BCD. Available in 2 versions for 50 and 53 mm chainline.