This Shimano Deore RD-M615 Direct Mount derailleur features Shadow Plus clutch technology that increases chain tension at the flip of a switch to reduce chain rattle and help improve shifting on rough terrain. This Direct Mount model works with both Direct Mount frames or traditional derailleur hangers using the included B2 link.
Long cage, top normal, Dyna-Sys 10-speed design. Maximum total capacity is 43T. Claimed weight is 339 g.