The Shimano Saint RD M820 Shadow 10 Speed Rear Derailleur is designed for one thing: gravity laden assaults. If you're kitting out a new downhill rig or a new setup for shuttled car laps, grab the simple, bare bones RD M820. Keep that chain tracking smoothly and the gears spinning no matter the conditions. With two modes, the Shimano Saint RD M820 Shadow 10 Speed Rear Derailleur can accommodate a ten speed DH cog or Trail cog with ease.
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