X1, Rear derailleur, 11sp., Type 2.1, Long cage anti chafe Oversized Grade 3 balls roll

Oversized Grade 3 balls roll on races which are ground to a mirror finish after receiving Magnetite and then Cryogenic treatments for hardness and longevity

Mips C2 system and advanced Polyacrylite shell for rotational impact protection

Improves braking performance and reduces brake squeal

All models still use top-end EVA foam to ensure comfort is maximized and weight is minimal

100% made in Germany – the Ergon GXR defines a new chapter in MTB grips

X1, Rear derailleur, 11sp., Type 2.1, Long cage anti chafe Oversized Grade 3 balls rollX HORIZON technology ROLLER BEARING CLUTCH technology CAGE LOCK technology X ACTUATION technology 12T X SYNC pulley wheels Silent pulley tooth design Weight: 256g SRAM Model ID: RD X 1 A2