• What is the size threshold for when tyres go from being measure in mm to inches? People don't say 'I'm hoping to squeeze in 76mm into this bike" but they will say 3". Seems like everything over 47 is referred to in inches. Is this true?

  • Rockshox provide max tyre size in mm. i have wondered if this is to differentiate from a tyre spec and encourage checking real-world widths. I shouldn't give these things that much headspace but there we go

  • Road and gravel bikes = metric

    MTB = imperial, unless you're measuring suspension travel, handlebar width, seatpost diameter...

    Ah fuck it, it makes no sense

  • I've run 700x50mm and 650B 50mm tyres so I reckon 50mm is the threshold.

    I've also fitted 700C x 2" tyres to the grrl's bike. So, basically, fuck knows. Everything should be metric but USA USA USA

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