Thanks to the SHIMANO SHADOW RD + design, the SHIMANO DEORE M5100 derailleur guarantees high and consistent MTB performance on rough terrain. The low profile design avoids impacts with rocks while the stabilizing technology of the SHIMANO chain reduces chain drop and ensures a silent transmission system regardless of the gear engaged. Utilizing the SHIMANO SHADOW RD + design, the SHIMANO DEORE M5100 rear derailleur delivers consistent MTB shifting performance over rough terrain. The low profile design avoids damage from rocks whiles SHIMANO's chain stabilizing technology reduces chain drop and makes for a quiet drivetrain in all gear positions. All products sold by Ridewill are NEW and have a guarantee, unless otherwise specified, of: 12 months for companies (Accompanying Invoice with.