I am just back in from my "ride your age" birthday ride [55]. Interesting solo ride, windy 30mph with gusts to 38mph, but that helped make up for the temps that were almost 100F at ride finish. The salty sweat, stretched fabric and saddle contact conspired against me and wore a hole in the bike shorts mid-ride, OUCH, did a reroute to the house for a quick wipedown/clean shorts. There are a fair number of hills, nothing steep but a few long climbs.
When do we get to convert birthday ride formulas from "ride your age" to "ride a century-minus-your-age?" ?