your "heavier = more traction" doesnt make sense. ...
You read half my post and contrived a diatribe based on it. Yes, heavier most definitely means more traction. Friction force is directly proportional to force normal to the surface through the friction coefficient.
BUT while heavier people have more traction, they also need proportionally more because they have proportionally more momentum that needs to change direction. So it's a wash in the first order analysis.
__________________
Cat 2 Track, Cat 3 Road.
"If you’re new enough [to racing] that you would ask such question, then i would hazard a guess that if you just made up a workout that sounded hard to do, and did it, you’d probably get faster." --
the tiniest sprinter