Just kidding. They aren't. But I've been reading that since 1992. Every few years an article pops up stating why hub centered bikes are superior in every way & someday all bikes will have it. A few hub centered bikes have come & gone. Another one just came out. I think the hurdle is marketing. Looks weird, even ugly & costs way more. Maybe they should allow them on race bikes if they're better & we'll see. For now I'm fine with forks.