Description RD-M6100 REAR DERAILLEUR DEORE SHADOW 12-SPEED LONG 51T MAXIMUM Features: Fast and precise shifting for modern mountain biking Silient drivetrain in all gear positions Decreased rear derailleur and chain tension in low gear Bigger 13T pulley Stable drivetrain in rough terrain Low-profile design avoids damage from rocks Chain stabiliser reduces chain drop, slap and noise
