Silver is the fastest color. It's complicated, but the short version is the sun reflects off the silver flake and the neutrinos flying off at light speed help push the bike forward. Multiply that by the number of flakes and it becomes obvious that silver has to be faster than black, which just soaks in the neutrino thingies. Simple physics.
You might ask 'Well, what if I'm traveling in the opposite direction?" to which I would just stare at you and sigh if you were here.
Edited cause I can't spell.
