Shimano XT RD-M8100-SGS Rear Derailleur - 12-Speed, Long Cage Youth Snowboard Boots bi-oval down tube and rectangular

bi-oval down tube and rectangular rear stays for maximum stiffness

better traction

5% progression

while the moisture-wicking insole keeps your feet fresh

using higher quality steel races

Shimano XT RD-M8100-SGS Rear Derailleur - 12-Speed, Long Cage Youth Snowboard Boots bi-oval down tube and rectangularDeore XT RD M8100 Rear Derailleur Offers fast and shockless shifting thanks to HYPERGLIDE+ technology The low profile design includes a bumper added to the derailleur pulley cage Shimano Shadow RD+ technology reduces chain slap and creates a quieter drivetrain Includes large 13t pulley Drivetrain is silent in all gear positions with decreased rear derailleur and chain tension in low gear Long cage is designed to be used with 1x12 drivetrain systems