32t chainring

11t cog

26in wheels

2.25in tyres

37.8mph

My cadence was….

165 (give or take)

http://www.bikecalc.com/speed_at_cadence

“spinny”

Zero tucked in down a very steep hill.

FFS does it matter, if it matters measure it

What on earth were you doing at that speed on that chainring?

@slowoldman, misreading the bike computer due to spinning an offroad gear on a tarmac hill?

I’d just gone 1×10 and wondered how much top end speed I had lost.

Long downhill road with a steady gradient and a strong tailwind, and thought let’s see how fast I can spin.