I'm not sure if you're talking about the tube diameter or other ergonomic features of your particular bar, but all points where you grab the bar are generally the same diameter, whether 26.0 or 31.8. It's just the clamp area that's different.


Either way, they're both right that there's nothing wrong with 26.0. I've used both and can't tell the difference. I'm on 26.0 right now simply because I'm cheap and would rather use my current classic bend bar than spend $50+ for similar in a 31.8 size.