Originally Posted by
ctpres
We ride with a 90-year-old who has several national and international titles for his age.
As for us, late 70s, retired 22 years and still riding 75-100 miles per week tandem and solo. I looked back at some 10 years ago Garmin data and was surprised to see that my average speed over 25-30 miles has not changed much - 13 to16 mph, depending on group, terrain (mainly flat) and wind. Max sprint speed solo has decreased from about 26.5 mph to 24-ish.
I no longer do centuries, but I suspect I still could at a leisurely pace:-)