• Yeah... I'm a bit annoyed as I don't want to fit the chain and then find out it won't work properly, necessitating both a new chainset and possibly a new chain (I'm a bit unsure about lengthening a 10sp Ultegra chain once it's been shortened).

    There's no 52/36 6601 chainset so I may have to bite the bullet and go 52/39. I'm usually cool with 34/23 on the steep stuff so 39/28 (yeah, it's a 12-28 cassette) might actually not be too bad. It's pretty rare that I use 34/28. In fact, just writing that ratio makes me disgusted with myself. HTFU it is.

    Really didn't want to spend that money though.

    Cant you just get the chainrings and EBay off the ones you have?
    I'm assuming 110 5 arm pcd here. But I'm no shimano expert.
    See the BBB ones....
    http://www.cyclesportsuk.co.uk/index.php?cPath=522

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