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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

  1. Start by installing the EX cog onto your freehub body
    • Start by installing the EX cog onto your freehub body

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

    • 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

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

    • 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.

    • 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

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

    • Be careful not to lose the small plastic washer

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

    • Check your shifting and go ride!

Conclusion

Thanks for reading, now get out there and ride!

The Hive

Member since: 12/05/2012

51 Guides authored

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