Shimano XT RD-M8100-SGS Rear Derailleur - 12-Speed, Long Cage, Black, For 1x bmx After the training wheels come

After the training wheels come off

FRONT RIM6061 aluminum

1 1/8" Standard cup headset

Speeds: 1sp Size: 1/2x3/32 Links: 98L Color: Black Type: Half Link

Drive Side Option RHD

Shimano XT RD-M8100-SGS Rear Derailleur - 12-Speed, Long Cage, Black, For 1x bmx After the training wheels comeDeore 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