I would presume reverse mounting enables better air flow as air is blown in as your ride as much as it is sucked in, compared to having it the normal way around and having to suck for its living.
By the way, what sort of brakes were you using? I'm using the regular V brakes that came with my mountain bike and if I was to ever brake like you did the first time you stopped, my brakes are worn and loose; I would have to make them tighter again (they burn up quick).
I'm trying to avoid disc brakes to save money... But if it is my only option, I will start saving.
And what sort of speedometer do you have? I have a wireless one but I don't know how to set it up.
I've tried the setting for my wheel size, and half my wheel size, but when I ride, it always says I'm riding at 99km/h. I can't get it to measure my speeds correctly.
Vibrations causing the problem? Interference of wires? Any help much appreciated.
And that was a great ride you did.

Think I'll go buy an action cam for my helmet too so I can record my rides.