I do not know but I usually pass BMX bikes like they are dragging an anchor, even on my commuter converted Rock Hopper. If I am on a road racing bike with a decent spread of gearing I would smoke him no matter how many Watts he puts out. The little teeny, weenie wheels can only go so fast on a fixie/SS BMX. But the I do not know part is passing up teeny boppers on a BMX might not be a good test of a strong adult rider. Most strong roadies can push 30 MPH and 25 miles in one hour is kind of a bench mark for some. Is there any reports of a BMXer covering 25 miles in one hour? I think it more likely he will boink out at about 16 MPH and you will catch him about or just before the 1/8 mile finish doing about 22 MPH. And from there on out it would be a fool's match for him.