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I need to replace my Ultegra 6600 right hand shifter as the ratcheting system is gone. The rest of the groupset is all the same 6600 series.

I am having a hard time sourcing just a right hand side shifter and they cost more than I really want to spend.

I am having a hard time working out what shimano shifters are compatible. I gather there has been a change in the brake pull length, so its critical that I get a compatible shifter for the 6600 brake.

Will a Tiagra 10 speed 5400 combined shifter/brake lever be compatible?

Is there a compatibility chart for the brake pull options?

Any suggestions appreciated.

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The Ultegra 6600 STI lever is available as a right hand only part. It should cost around $400 dollars for the right shifter only, and around $600 dollars for the set.

Any Shimano 10 speed rear shifter, including the new Tiagra 4600 10 speed will be compatible. If you have current brakes, and you use a 10 speed STI lever, as previously noted, you will have no problem with the brake pull.

The compatibility chart can be found here. Drivetrain Compatibility Front Drivetrain Compatibility Rear

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  • Another brilliant answer from zenbike
    – Mac
    Mar 24, 2012 at 11:03
  • I hope that is a joke. :)
    – zenbike
    Mar 24, 2012 at 11:47
  • Do you have a link to the diagram, it's a bit small to make out?
    – Ifor
    Mar 24, 2012 at 16:11
  • It's a scan of a paper copy, so no links.
    – zenbike
    Mar 24, 2012 at 16:27
  • 1
    Current charts: productinfo.shimano.com/#/com
    – armb
    Oct 6, 2020 at 8:58

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