Originally Posted by 1speedlos

I'm sorry, what are IABs?
I haven't raced on the road in about 15 years, so I'm not super up-to-date on current rules, but I've been a bike mechanic for about 25 years. For a long time, the UCI clearly stated its position on equipment that was purely designed for aerodynamics was about safety- a rider on aero bars in a mass start event does not have the control necessary to safely ride in those conditions. I'll bet we both know riders who are sketchy regardless of equipment...

Sure, rules such as tire width might be arbitrary, even anachronistic, but they might figure that some lines need to be drawn. As far as whether that ruling is to maintain a certain aesthetic, or out of nostalgia, I wouldn't venture a guess.

Los