SHIMANO Deore M5120 Rear Derailleur - 10/11-Speed - SGS compatio_raw Ring is attached via 3

Ring is attached via 3 bolts on the back side of the spider near the spindle

down low to get the rack and load down out of the wind

With the GR 1600 you definitely are

high stability

Running dynamics also help you improve your form (requires compatible Garmin smartwatch)

SHIMANO Deore M5120 Rear Derailleur - 10/11-Speed - SGS compatio_raw Ring is attached via 3Utilizing the SHIMANO SHADOW RD+ design, the SHIMANO DEORE M5120 rear derailleur delivers consistent MTB shifting performance over rough terrain. positions. Low profile design avoids damage from rocks Chain stabilizing technology reduces chain drop and makes for a quiet drivetrain in all gears 46T(1x10), 42T(2x11 2x10) : Max Low Sprocket Pulley teeth: 11