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Thread: Going from a triple to a double - what don't I know?

  1. #51
    TwoWheelsDC's Avatar
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    Done. The hardest part was re-cabling everything. Actual setup of the derailleur was relatively painless. Off to do a shakedown ride now, but man, this new setup looks a million times better.


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  3. #52
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    Quote Originally Posted by TwoWheelsDC View Post
    Done. The hardest part was re-cabling everything. Actual setup of the derailleur was relatively painless. Off to do a shakedown ride now, but man, this new setup looks a million times better.
    Agreed!

    I don't know if you have an easy way to measure it, but I am very curious what the chainline is for that crankset. The fit guide seems to suggest it is less than the 47.5 I would have assumed for a disc-brake-focused group (?)

    I am considering getting a Force 1 to replace my Rival (double), but don't want to change my chain line.

  4. #53
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    Quote Originally Posted by hozn View Post
    Agreed!

    I don't know if you have an easy way to measure it, but I am very curious what the chainline is for that crankset. The fit guide seems to suggest it is less than the 47.5 I would have assumed for a disc-brake-focused group (?)

    I am considering getting a Force 1 to replace my Rival (double), but don't want to change my chain line.
    Specs say 45.5mm, and just eyeballing it (from roughly center of 86mm BB shell to chainring tooth) was like 44.7 according to my digital caliper...I'd assume enough margin of error in my measurement to trust the 45.5 number.

  5. #54
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    Quote Originally Posted by TwoWheelsDC View Post
    Specs say 45.5mm, and just eyeballing it (from roughly center of 86mm BB shell to chainring tooth) was like 44.7 according to my digital caliper...I'd assume enough margin of error in my measurement to trust the 45.5 number.
    Interesting. I imagine that it doesn't matter much on a long-chainstay frame, though I spend most time in the smaller cogs so I will probably stick with a double crankset with a single ring mounted to outside of spider. (Mine both measure 47.5)

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    Is there a clutch derailleur that's compatible with my Shimano Tiagra 10spd shifter? I'm not even sure how to figure this out.

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    Quote Originally Posted by jrenaut View Post
    Is there a clutch derailleur that's compatible with my Shimano Tiagra 10spd shifter? I'm not even sure how to figure this out.
    You might try this "compatibility chart" from Shimano if you can figure it out.

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    Quote Originally Posted by bentbike33 View Post
    You might try this "compatibility chart" from Shimano if you can figure it out.
    I have wished for something like this for a long time. Thanks for the link!

  10. #58
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    Quote Originally Posted by bentbike33 View Post
    You might try this "compatibility chart" from Shimano if you can figure it out.
    This would be super helpful except now I'm looking at Shimano's website and it appears that they do not sell a 10 speed road derailleur that will take an 11-42 cassette. This is clearly going to require some more research.

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    I think this $20 WolfTooth bit would allow your existing 10-speed road RD and br—uh, shifter, to handle an 11-40 cassette. Someone will correct me if I'm wrong.
    http://www.wolftoothcomponents.com/c...ducts/roadlink

    No clutch, can't use a 42t rear cog, but maybe you don't need those things ...

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    Quote Originally Posted by jrenaut View Post
    This would be super helpful except now I'm looking at Shimano's website and it appears that they do not sell a 10 speed road derailleur that will take an 11-42 cassette. This is clearly going to require some more research.
    I believe the great folks at Bikenetic may have finagled something to make a mountain derailleur work with a road shifter for someone's cross bike that was swapped to an 11-42 ten speed cassette. You may ask Jan or Pete about it.

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