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MPN: IRDM820SS1 - Shimano - Saint RD-M820 Rear Derailleur - Rear Derailleur. Shimano Saint RD-M820-SS1 Rear Derailleur - 10 Speed, Short Cage, Black. Derailleur Action Top-Normal (Traditional). The third generation of Saint was developed under the “Pure Gravity” design philosophy with a clear focus on downhill speed.

MPN: IRDM820SS1 - Shimano - Saint RD-M820 Rear Derailleur - Rear Derailleur. Shimano Saint RD-M820-SS1 Rear Derailleur - 10 Speed, Short Cage, Black. Derailleur Action Top-Normal (Traditional). The third generation of Saint was developed under the “Pure Gravity” design philosophy with a clear focus on downhill speed.