It was a bit tongue in cheek, as for a lot of riders averaging 20 mph for 100 miles, I doubt it. The weather and terrain are critically important whenever these kind of challenges are attempted and of course we only have the riders word for it if they are not in a race, not that I would doubt the truth of whatever is said on Cycle Chat. Just popping over to the helmet debate.....................
I did use the weasel word
'potentially'!
I would be very happy to do a 5 hour century but I think the chances of it are receding now. I am still getting fitter, but my rate of progress seems to be only about 25% of what it would have been 3 or 4 years ago, pre-illness. I have done over 3,500 hilly miles so far this year but am still lacking any real
'oomph'. I used to get pretty fit on much less work than that, but my lungs are still holding me back. Never mind - as long as I feel that I am getting better, I don't care how long it takes.
I'll forget about 5 hours until I have managed 6 hours again - it is many years since I even managed that time!