FYI I'm 6'2" @ 175lbs, and I'm definitely a big bike racer. AKA, I can easily take positions just by being imposing, and in the event that someone does kiss my bars, its usually them that bounces off me.
However, when the road goes up, I suffer like a dog.
I do race with a guy who used to be an offensive linebacker in college, he's a cat1. He's easily 200lbs and I've seen him drive a break, and then literally ride away from them and take the win.