You hear about A, B, and C group rides. I am curious as to what everyone feels the average speeds for these groups are. I belong to two clubs in north Phoenix. One club has two groups, more or less A and B groups. The A group is published as race pace, while the B group publishes 20 mph on the flats. For the B group, the average for a 40-50 mile club ride will be 17 - 18 mph. The other club has just one group, and the published average is 15 mph for a 50 mile ride. I would call this a B or C ride.

What are some other opinions?