Ah... speed...
In road races I never got above 48mph unless in bunch when 55+ was broken.
The tandem regularly hit 60mph down the Trundle at Goodwood.
The trike never more than 48mph.
Now Fish Hill coming off the Cotswolds... that would be a belter!
Fish Hill!
That's a bit technical for those sort of speeds isn't it?
I saw a car crashed in the road there at around 0200 one morning about 6 years ago.
My top recorded speed was 55, descending into Death Valley in California. A long and straight road, so no skill needed.
I've done 50 a few times in England and Wales, but my fixed wheeling prevents me from chasing high speeds.
I clocked 44 descending from the Cross Foxes going eastwards from Dolgellau on the Bryan Chapman on my 86" fixed. I recon a tandem could crack 100kph on that descent, with the aid of a large chainring.
I don't see the logic in worrying about the speed. Once you get over 30mph, I reckon you've pretty much had your chips in a collision and as for gravel rash, 30 mph will do plenty of damage. I only go really fast when I have no doubts that I am safe. There are never any guarentees, but I am not a risk taker. It's a very low risk activity if done sensibly.