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Count me as one of them, 25 miles (40.2km) in 59:25 last year with <1.5 miles between start and finish points. DannyAlf and @umop3pisdn both went quite a bit quicker on fixed, so there's 3 to start with, and @pnut went a lot faster than any of us. @Fixedwheelnut did 36.902 km/h for 25 miles, so there's a good chance he could pick a 1 hour segment where he did >37km. @xavierdisley was sub 2h for a 50 on fixed, so he must have easily done a 1h segment of over 40km
I'm quite sure a maximum of only 3 people of this forum has ridden the >36.96 in an hour (return leg, no drafting, fixed gear) within the last year.