• Thanks, I'm sorted for this now.

    I'm already on a 49T ring, with 15T sproket at the moment, my bike was always on that... But I just bought especially a 50T ring (from Countryboj this morning actually, nice meeting you, nice Cannondale!!) Then I had a spare 16T sprocket so all is good on that department now.

    Checked BB height and I'm spot on at 11inches.

    Just a matter of sourcing tyres this WE and I can't see why the MBK shouldn't be legal. We'll see what coaches say, I booked with bike hire so all options are covered.

    @veLLo I'm on the same gear at the moment, thought I might use a 14t cog on 47 but that's way big (for me) at 88".
    I might have a couple of decent 49t (144bcd) knocking around, if you want to borrow one for the day ... I have to return a tensionmeter to you anyway.

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