Sounds like someone's capstone mechanical engineering course term paper is due this week so they're scrambling for filler text to support a thesis.

But, in case the quest was true, I will first need the OP to define what they mean by:
1. "Evolution"
2. "Peaked"

Without those definitions I will simple state that bicycle design "peaked" with the first Safety Bicycle, and everything after that for the most part is evolutionary refinement with a few divergent tracks taking off.

Okay, now to see if the OP returns, or will Opie be down by the fishing hole with Andy while Barney Fife sets up a speed trap.