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  1. #1
    Senior Curmudgeon Halfast's Avatar
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    Make a 6600 12-27 a 12-28 using 6700 11-28 cogs?

    Has anybody taken off the 21/24/28 cogs off a 11-28 6700 and put them on a 6600 12-27 to make a 12-28? I hate to give up the 16 and do not need the 11 cog. Seems like it ought to work.
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  2. #2
    AEO
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    looks like it'll be a very straight forward swap, since the 12-27 has 21-24-27 on the spider.
    just be sure to use the 12T lockring from the 12-27 cassette.
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
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  3. #3
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    From the tech documents that I could find it appears that you can do that. The 11-28 shows to be all individual cogs except the largest three.
    Personally I would much rather have the 16 than the 11. But I'd also rather have the 12-27 than a 12-28. It just depends on where you ride and what you need.

  4. #4
    Gear Combo Guru Chris_W's Avatar
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    Personally, I'd prefer to have tighter spacing on the low end than have a 16 tooth cog. Shimano's 11-28 has 19-21-24-28 and SRAM's has 19-22-25-28, but the BBB and IRD 12-28 cassettes have 19-21-23-25-28 (but no 16 tooth cog). I ride in the mountains a lot, so find tight spacing on the lower gears to be essential, your typical riding situation may make other parts of the cassette more important to you. Of course, with a Campy 12-29 11-speed then you can have the 16 tooth and the close spacing at the low end, and one extra tooth! Bliss!

  5. #5
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    I expect it will work but it seems awfully expensive to gain one tooth. That's less than a 4% improvement.

  6. #6
    Senior Curmudgeon Halfast's Avatar
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    Quote Originally Posted by HillRider View Post
    I expect it will work but it seems awfully expensive to gain one tooth. That's less than a 4% improvement.
    I already have both cassettes and am planning a very hilly/mountain ride where I can use that 4 %!! I am old, fat and slow!!

    My LBS tells me that Shimano is coming out with 10 speed mountain bike stuff and will allow a larger cog set that one can put on road bikes.
    "The object of life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane."

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    6600 to 6700

    I have done exactly that and it works fine.

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