Interesting stuff. I have only done 1 40K TT, and that was such a hilly course ( 10% climbs) that I don't think I can use it as an indicator as to how I'll do on the Flat State TT course next weekend. But, I have done a couple 20K TT's (Horse Country TT) and managed 24.3 mph at a measly 203 watts avg. I'm hoping I can bump that up to 25+ mph to break the hour mark. I was curious what the lowest wattage someone broke the hour mark at.