• I have done fairly decent sized descents and not had an issue

    That's not really a sample rate. Subjective experience aside, as many on here have done the same.
    My experience stems from a fleet of bikes, set up evenly, maintained regularly, ridden over varying terrain in diverse conditions.
    Statistically, there was a higher failure rate from 140mm rotor equipped bikes in relation to 160mm equipped ones.
    Whether this proves causation, I'm not a statistician so I can't tell you. Maybe the 140mm equipped bikes had brake dragging noobs on them and that fucked them up and vice versa.

  • If you estimate how many failed of each rotor we can tell you whether it's a statistically significant difference.

    But the statistics cannot prove causation in this case 😉

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