SHIMANO Rear Derailleur Long Gauge ERDR2000GS CLARIS (ROAD) RD-R2000-GS

Shimano part: ERDR2000GS Pulley cage / Installation: GS / Direct mounting Rear compatible speed / compatible chain / total capacity: 8 speed / HG-8 speed / 43T Compatible top gear (min/max): 11/13T Compatible low gear (min/max): 28/34T Maximum supported front tooth number difference: 20T