Picked up this Marin frame to build up.

Didn’t come with any components so I’m toying with updating it with BB MT-801, MT-770 8/9/10spd free hub, and CS-M770 9spd cassette. Thinking about an XTR RD-M952 derailleur and XT FC-M770 cranks and just running a single N/W ring.

I am curious if anyone has switched to a 1x setup on an old frame and if the chainline isn’t too wonky? BB shell on this frame is 68mm. Rear spacing is 135mm.

by Altruistic-Elk5519

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4 Comments

  1. simplejackbikes on

    It will be fine. With the 68mm shell you use the extra 2×2.5mm spacers which come with the BB. You can change the placement of these to adjust the chainline if needed.

  2. No idea about Hollowtech, but I ride a 95 Pine Mountain, which may be pretty much the same frame and I’m running a 110mm square taper BB with one 2.5mm spacer on Suntour XC Pro cranks which gives me a very tight Q factor and nice chainline on a 1×10 setup.

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