Shimano 105 RD-5700 10s

Top Features of the Shimano 105 RD-5700 Rear Derailleur
Short Cage
Large 11 tooth pulleys increase service life and reduce noise
Super light shift action
Compatible with 8, 9, and 10-speed drivetrains
Maximum low sprocket 30T
Maximum front difference 16T, total capacity 34T
Average weight 221 grams
Medium Cage
10-speed 105 wide link rear dérailleur medium cage – GS
Advanced Wide Link design increases rigidity and shifting performance
Super stiff for fast and accurate changes across the cassette
Large 11 tooth pulleys increase service life and reduce noise
Super light shift action
Compatible with 8, 9, and 10-speed drivetrains
Maximum low sprocket 32T with double chainset
Maximum front difference 22T, total capacity 40T
Average weight 232 grams