SHIMANO SLX M675 Shadow Plus 10 Speed Rear Derailleur Shadow Plus features a super low profile design that reduces the risk of damage Shadow Plus uses a chain stabilising switch that when on will reduce chain bounc e Wide link Shadow design Dyna-Sys 10-speed top normal Deore rear derailleur Direct cable routing prevents snagging from any trail side hazards Alloy and steel construction leads to lower weight without compromising strength and durability