Shimano Umwerfer Altus 34.9?mm (31.8/28.6) T 07?Swings, DUAL-R. 66-69?? 42/48Z E-FDM310X6 by Shimano Umwerfer Altus 34.9?mm (31.8/28.6) T 07?Swings, DUAL-R. 66-69?? 42/48Z E-FDM310X6