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  1. #1
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    biggest cassette I can use.

    Building my first cx style bike for commuting and pulling the kids in the burley. It's rather billing our area so I want the biggest cassette I can get. I'll be building the bike with shimano 105 components and a 46/38 crank. What is the largest 10 speed cassette the 105 rear derailleur will take?

  2. #2
    lamer
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    Re: biggest cassette I can use.

    According to Shimano the RD-5700-GS can do 32T. I ran this and an 11-32 cassette on my Surly without a problem. A month or so ago I posted a link to a Shimano doc that has these limits listed. It might be in my gallery, but I can't check from my phone right now.

  3. #3
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    Thanks! 36 would be nice but 32 will get the job done.

  4. #4
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    just put a 12x30 on my durace
    worked fine, great for a 17% hill we have, i felt like i was able to spin rather than just grind up it.
    the idler did rumble a little even with B screw fully in, but not noticeable over the screams from my legs!
    spez roubaix
    fantom cross
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    moonlander

  5. #5
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    I have run an 11-36 XT 10 speed cassette and RD-M772 SGS 9 speed RD with an Ultegra 6700 crank, 10 speed chain, STI's and FD on my Soma Double Cross - worked fine. I would run a 50/36 compact crank or get a 52/39/30 triple - that way you can match the FD to a crank it's designed for.

  6. #6
    lamer
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    Looks like it wasn't in my gallery, but I did find my old post. Let's see if pasting the quote tags will work

    Quote Originally Posted by llamma View Post
    Did a little more digging, and for those of you that are curious I found this:



    ST-4600 is compat with RD-5701-GS with a cassette that has a max 27 to 32T cog



    source: http://www.celebrazio.net/bicycling/...no_jp_2014.pdf

    Honestly, the B screw wasn't all the way in with the 32T on my Straggler, so if you wanted to get adventurous you could try a 32T if you had one laying around.
    Last edited by llamma; 07-17-2014 at 08:01 PM. Reason: embedded image

  7. #7
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    have you considered using the sram apex/force shifters&front and x9 rear?
    50/34 with 12/36 rear gives a pretty wide range of gears.

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