• Both 801 and 501 will fit, 801 will need the plastic TL FC25 tool which will fit any regular HTII BB tool, basically a step down washer.

    Surly says Chainring Clearance 24/36/48t so you should be able to clear quite a bit more than 36T.

    Nothing beats actually trying one on though.

    What's currently on there?

    Photo of full biek?

  • There's nothing currently installed. It was only after taking off the Middleburn square taper 32T cranks and removing the BB that I suddenly thought "hmm, I wonder how wide that BB shell is?" and that's when it dawned on me that the cranks were for 68mm and the shell measured 73mm.

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