Originally Posted by
TimothyH
Only very strong riders and likely not solo efforts.
15 MPH to 18 MPH average speed is more likely for most riders on solo rides more than 20 miles.
Very true. The only people pushing 27 mph solo for 20+ miles are pros or very quick amateurs who are training for time trials and using their TT bikes/all the associated gear, or people riding in very fast road races. Or maybe they're just riding with a massive tailwind and not turning around.