Just got a bike computer, which is asking for my (or rather my Dawes Horizon's) wheel size. The tyre is covered in numbers and I have no idea which to use - 622, 128, 350. The default figure in the computer is 155. What do I tell it?
Thanks,
Daniele
looks like you need the circumference in cm
go back to the tyre markings, you want the figure preceding the 622. say it is 28-622, then the circumference is ( 3.14 x (622 +(28+28)))/10 = 213 -- --- Marten Gerritsen
