One thing you won't get with the Shimano Deore M615 10-Speed Rear Shadow Plus Derailleur GS is sticker shock. Among the many things you will get is Shimano's advanced Shadow RD Plus chain management. Shadow RD Plus uses several features to keep your bike running quietly, shifting smoothly, and preventing chain drop. Equipped with a "clutch," or what Shimano refers to as a stabilizer switch, the Deore rear derailleur maintains chain tension by preventing excessive cage movement. This prevents the chain from slapping against the chainstay and front derailleur cage, keeping your ride silent. Holding the cage, and thus the chain, taut prevents the chain from jumping off of the chainrings or cogs, practically eliminating dropped chains. Shadow technology also moves the derailleur closer to the bike, reducing the chance of smashing the derailleur on a rock or catching it on trail obstacles. Optimized cable routing to the derailleur also helps to improve shifting performance. Get the shifting and security technology Shimano is famous for without cracking your piggy bank wide open with a Shimano Deore Shadow Plus rear derailleur.
