Gravel / Gravé / Gnarmac / Groad / ATB

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Alb in reply to @MisterMikkel

26x2.4" = 650bx47 (both approx 685mm dia.)

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Jaap in reply to @Alb

Do I need a new calculator?

26" = 559mm rim diameter.
2.4" = 61mm tyres
61+61+559=681mm
650b = 584mm rim diameter
47+47+584=678mm

Still very close, but 685mm?

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frankenbike in reply to @Jaap

There are different ways to calculate it. Some people assume a circular tyre profile, others don't, etc.
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Alb in reply to @Jaap

Nope, your calculators' fine but you might want to verify against some real world measurements...
https://singletrackworld.com/forum/topic/anybody-got-any-650-x-47-wtb-horizons/

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