It would have been interesting to see what Chris could have done in an hour on a set of rollers. It would have been far higher than 38.7mph
I dont suppose he spent the odd minute or two doing no hands either to change tunes on his I Pod or ease his back. If you drop down to 80rpm you hit 30mph. Anyone who rides the rollers over time knows that just riding at one cadence becomes boring. You have to do intervals.
You dont need to really debate it. Riding rollers for an hour is far piss easy than riding the boards for an hour.