Could use some narrow q-factor Crank recommendations- Mtbr.com
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  1. #1
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    Reputation: Carl Mega's Avatar
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    Could use some narrow q-factor Crank recommendations

    Howdy-

    I'm admittedly a bit out of the loop on current offerings and I'm a bit specific on what I want. Figured I'd ask the collective here if I'm overlooking something.

    First - what I need: 170mm arm length - no greater than 168mm Q-factor, works on a 73mm threaded BB, Boost Compatible

    So far I've found:

    new Eagle XX1/X01 -168 Qfactor - but expensive retail
    NOS 11sp XX1/X01 - 168 Qfactor - hard to find but exactly what I'm using now
    GX Eagle GXP - 172 Qfactor - not what I want but cheap until I find somethng else
    GX Eagle Dub - 172 Qfactor - same
    All Shimano cranks - 176 Qfactor - too wide - hard pass
    e13 TRS - 168 Qfactor - expensive and sold out
    Race Face - I think only the NextSL has 168 Qfactor and rest over 170
    Cane Creek eWings - expensive bling but 176 Qfactor is a pass

    I'm a bit persnickety but I need my bikes to fit exactly the same so the 170mm/168Q is important to me. Right now best bet for me is New Old Stock 11sp Sram carbon stuff - Ideas?
    Working to stomp out redundancy, I repeat, working to stomp out redundancy.

  2. #2
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    Reputation: Carl Mega's Avatar
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    Heh. TFW you are the only replying to your own thread.

    Here for future picky folks. Looks like the Truvtiv Descendant dub boost (not super boost) has a q-factor of 169. In the aluminum models: 6K, 7K and the Carbon models. Tiny bit surprising the regular GX stuff is 172.

    https://www.servicearchive.sram.com/..._mtb_ffs_0.pdf
    Working to stomp out redundancy, I repeat, working to stomp out redundancy.

  3. #3
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    Not saying it would be true for you, but for me, the diff between 168 and 172 be totally imperceptible. Diff in cleat position wrt my foot would be much more variable between shoes. Then, of course, there're flats. Depending on whether or not you choose to use pedal washers there's 2+mm there.
    Do the math.

  4. #4
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    Reputation: Carl Mega's Avatar
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    Yeah thanks man - I totally understand what you are saying but I'm pretty versed in bike fit and dozens upon dozens of bike experiences shaping my own personal preferences. I can immediately tell. It's not as the straight up "expect pain for a weeks while you adjust" like it used to be as I've introduced quite a bit of tolerance into my fit contact points over the years...Rather, it's merely annoying (wider than 168pt - I'd go narrower if there were options). But I get it - most people can't notice or even give a hoot.

    Anyway - I think I have it sorted for the latest build as the 169 Qfactor for the Descendant dub will hit the right mark. Being extra particular as a driving theme for me on the last few bikes in my stable is as much as possible will be the same to reduce what distracts: bars, grips, pedals, saddle, tires, general fit, etc.

    Cheers.
    Working to stomp out redundancy, I repeat, working to stomp out redundancy.

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