Shimano XT RD-M786-GS Rear Derailleur - 10 Speed Medium Cage Black CheckoutSpec= 7.3mm OD 8mm is for road

8mm is for road

}SRAM 42 Tooth 107mm BCD x 4-Bolt 1x12-Speed X-Sync Chainring Polar Gray

Fits into jaws of engineers vice

but can also be fitted at the rear for even more grip

Paired with our stiffest and lightest RED calipers

Shimano XT RD-M786-GS Rear Derailleur - 10 Speed Medium Cage Black CheckoutSpec= 7.3mm OD 8mm is for roadShimano Deore XT RD M780 M770 Series Rear DerailleursLow profile design and single tension construction keeps the derailleur body from contacting the chainstay Stronger return spring for more crisp shifting feeling Direct routing reduces the risk of snagging Largest Cog 36 Color Black Rear Der Shifter Compatibility Shimano Mountain Rear Derailleur Mount Type Shimano Rear Direct Mount Drivetrain Speeds 10 Weight 262 Chain Wrap Capacity (teeth) 43 Cage