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  • Just watching Tour of Basque Country on Eurosport.

    Magnus Backstedt reckons Tony Martin running a 58t big ring alongside a 34t or maybe 36t on his TT bike.

    How does that work? I always thought there was a maximum difference between the two sizes of ring if you wanted any sort of reliability on your shifts.

  • Is he running osymetrics/q-rings? (someone correct me if I'm wrong) but I thought that ovalised ring tooth counts are higher than the equivalent circular ring. If it's ovalised then the smaller section would act as an effective 54t-ish ring during downshifts.

  • Only if you shift at an exact point in the crank rotation - the same for upshifts.

    That's still a massive jump. Pro mechanics have special powers.

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