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  • The EX cog should only be used with a new, or nearly new drivetrain. Your chain and cassette should show no wear prior to install. Worn components will affect shifting performance.

  • For Shimano 10sp drivetrains it is vital that your chain is installed correctly for good shifting performance. Refer to your Shimano chain users manual for more information.

  • For 1x use, a mid cage or longer derailleur must be used

  • For 2x use a long cage derailleur must be used

  • Do not use with a 3x system

  • Always refer to your drivetrain manufacturer's recommendations on chain wrap

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Start by installing the EX cog onto your freehub body The side with the logos should be down towards the hub The side with the logos should be down towards the hub
  • Start by installing the EX cog onto your freehub body

  • The side with the logos should be down towards the hub

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Install your cassette To fit the EX cog, one of the cassette cogs will need to be left out If using the 40t EX cog, leave out the 15t cog and spacer
  • Install your cassette

  • To fit the EX cog, one of the cassette cogs will need to be left out

    • If using the 40t EX cog, leave out the 15t cog and spacer

    • If using the 42t EX cog, leave out the 17t cog and spacer

  • Continue installing the cassette cogs, be sure each cog is facing the correct direction, refer to your cassette owners manual for more information

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Lightly grease and install the cassette lockring and torque to spec. Lightly grease and install the cassette lockring and torque to spec.
  • Lightly grease and install the cassette lockring and torque to spec.

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Install the wheel back on the bike
  • Install the wheel back on the bike

  • Check shifting quality by shifting through the higher gears (smaller cogs)

  • If your cassette is not shifting properly, adjust the derailleur using only the smaller cogs.

  • If you are unsure how to adjust your rear derailleur, consult your derailleur owners manual or visit your local bike shop

  • You should have perfect shifting in these smaller cogs before adjusting shifting into the EX cog.

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Shift into the EX cog Adjust the B-limit screw so that there is a 5-6mm gap between the upper derailleur pulley teeth and the teeth on the EX cog
  • Shift into the EX cog

  • Adjust the B-limit screw so that there is a 5-6mm gap between the upper derailleur pulley teeth and the teeth on the EX cog

  • If you are unsure how to adjust your B-limit screw, consult your derailleur owners manual or visit your local bike shop

  • You can also hear when the B-limit is not adjusted correctly as the teeth will grind together. Adjust the B-limit screw in until quiet

  • For the 42t cog, you will likely need to install the provided longer B-limit screw

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Simply remove the stock B-limit screw and install the new one Simply remove the stock B-limit screw and install the new one Simply remove the stock B-limit screw and install the new one
  • Simply remove the stock B-limit screw and install the new one

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Be careful not to lose the small plastic washer
  • Be careful not to lose the small plastic washer

  • If it comes out be sure to re-install it

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  • Check your shifting and go ride!

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Conclusion

Thanks for reading, now get out there and ride!

The Hive

Member since: 12/05/2012

51 Guides authored

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