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  • You may have commuted on 84" fixed Ok, but bear in mind that the Brompton will almost certainly be heavier and less aerodynamic than whatever bike you were using.

  • Yep, you're right regarding both weight and aeros, but I'm spending a lot of time spinning wildly on 74" at the moment and barely ever using the 54" gear. Def need them bigger.

    New sprockets ordered, anyway. Will stick the 58t on at the weekend if I find a minute...

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