The Saint RD-M810 Rear Derailleur packs the same legendary durability you expect from this premium Shimano line with a lower weight and low-profile design. While the Saint Derailleur weights only 250g, it uses Shamano’s Shadow technology to reduce the chances of getting clipped on a rock or stump. Unique design characteristics let you run road or full MTB cassettes with the same cage. Plus, you get the precise one-click shifting you demand for your ride.