• Yeah, I don't really want to take cranks off another bike so I'd be buying the whole crankset. I'm trying to work out which is the best option though. DFour is for Shimano which means good but spendy chainrings and I'm not sure they do 36T outers for 9000/9100 so we veering towards the DZero which then has a choice of Red or Quarq crankarms. No idea about either.

    I would be fitting new rings before this year's races anyway so need 110 bcd 34T 36T or similar. I might run a bigger outer for RaTN coz it's flat but I have that kind of stuff kicking around anyway or it's cheap.

    Like, which of these... ? I dunno. They all look the same to me, save for the DZero/DFour choice and then crankarm difference.
    https://www.sigmasports.com/brand/quarq#size%5B%5D=165mm110bcd&size%5B%5D=165mm&page=1&filters=%7B%7D

  • 36T outers

    46t? Or are you really having a 2t difference between inners and outers?

    If you want GXP BB, 46t outer (that rules out Shimano 4 bolt rings AFAIK) then you are left with the following options:

    1. hidden bolt or not hidden bolt? I'd say not hidden bolt so you're not tied into SRAM rings.
    2. carbon or alloy crank arms.

    Then it's just a question of choosing your chainrings.

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