I just think that if you are resonably fit you should be able to accelerate on the flat at 70GI to the point where it is too spinny (120rpm +) to keep it up for a long time comfortably.
you keep up speeds of 24mph for a long time comfortably?
That is more than reasonably fit in my book!
you keep up speeds of 24mph for a long time comfortably?
That is more than reasonably fit in my book!