The Shimano XT M786 Shadow Plus Rear Derailleur is built tough to handle any abuse. No matter the terrain, just engage the stabilising switch, and you can significantly reduce chain slap, dropped chains, and missed shifts. This means you don't really need an extra chain device to keep the chain tension. The strong spring in the M786 ensures smooth and precise shifting. The RD - M786 - SGS Shadow Plus rear derailleur works only with 10 - speed Dyna - Sys shifting components. It's a 10 - speed derailleur with a max cassette range of 11 - 36t. It features a 10 - speed Dyna - Sys system for consistent shift effort, Advanced Light Action for smooth long - term riding, a Shadow+ stabilizer that adjusts spring resistance for different riding conditions, a low - profile shorter cage to reduce chain bounce and improve ground clearance, a direct mount option depending on the frame, a medium cage (GS) with a max rear sprocket of 36T, a max front difference of 18T, a total capacity of 43T, and it weighs 235g.

Using your Shimano XT M786 Rear Derailleur is easy. First, make sure it's properly installed on your bike, following the direct - mount option suitable for your frame. When you're riding, engage the stabilising switch when the terrain gets rough to reduce chain issues. To shift gears, just use your bike's shifter as you normally would, and the derailleur will smoothly move the chain. As for maintenance, regularly clean the derailleur with a soft brush and some mild cleaner to remove dirt and grime. Check the tension of the spring and the alignment of the cage periodically. Also, remember that this derailleur is only compatible with 10 - speed Dyna - Sys components, so don't try to use it with other systems.