Brucey wrote:Phil_Chadwick wrote:well, no. That's a response to a different point than the one I was making.
but it isn't even always a very useful comparison for the same rider on the same bike, because of the way air resistance and rolling resistance vary.
erm, yes it is, since all we're comparing is the same bike and rider on the road or on the rollers.
You found it was easier on the rollers on your bike; I find it easier on the road on my bike
Clearly it's not sensible to try to make conclusions from performance on one and map that to the other. They're different. All you can do its try the two and see how they compare. if that is of interest to you.