Originally Posted by Warblade
It's not impossible for him to sprint that fast especially if he was in a pack where he could get draft. And it totally depends upon what a pro tops out at. The terrain, wind, good leadout are all factors. Sometimes pros can get into the high 40s to low 50s depending upon the climate and terrain. So no, it's not impossible. I personally have sprinted that fast before and I'm only 16. But then again I'm pretty strong for a 16 year old.
Low 50's? Are you saying pros sprint at 85km/h? I'm not buying either, though maybe match sprinters on indoor tracks manage those speeds, who knows, and maybe downhill with a tailwind...