Dear Mr Frog,

"18-27 mph headwinds are less than desirable. I averaged 7.7 mph on my speed"

7mph=about 12kph

As a Canadian over forty, I have no problem with mixing mph and kph, in fact reaching 100mph or 150mph for the first time were memorable moments. I follow motorsport a lot and am used to both...however with biking (cycling) the mph speeds are so much lower that I find I have to calculate mph into kph to compare it to my experiences on bike

no matter how you slice it, 7.7mph or 12kph average is a slog, in the cold too....I'll take a climb over that.