You’re probably right—I used to ride at 20 mph rate in our club’s 30-min “tourist” time trial on my touring bike with racks, etc. and I didn’t even know about training back then. Bound to be a lot of folks on here he could do 24 mph pace for 30 min.24 mph for ~30 mins? I'd be pretty surprised if someone here couldn't readily do that. Give me that TT setup and I'd bet even money I could do that in my current fitness, and I'm SURE there are a lot of folks far stronger than my 56-year-old arse on this forum.