Shimano M5100 Derailleur REAR 11sp blk specializedbikes The BR-M8120 4-piston caliper is

The BR-M8120 4-piston caliper is designed for tough enduro trails

Built-in 8mm hex for removing crank bolts

due to the inside facing mesh pockets

Excess dirty fluid drops into a second lower reservoir so it’s kept away from the clean chain

Two 16g threaded cartridges

Shimano M5100 Derailleur REAR 11sp blk specializedbikes The BR-M8120 4-piston caliper is1x11 speed SHIMANO SHADOW RD+ rear derailleur MTB: Direct attachment (Shadow+) 11T Min top Sprocket 51T Max Low Sprocket Stable drivetrain on the trail Low profile design avoids damage from rocks Chain stabilizer reduces chain drop, slap and noise Silent drivetrain in all gear positions Decreased rear derailleur and chain tension in low gear Bigger 13T pulley