Originally Posted by PeteHski

It's a test of aero vs lightweight climbing wheels. Weight difference is 435g. That's almost 1 lb, which is about the difference between an aero and climbing bike at the same tier level. The aero effect would be even more dominant if you were comparing aero vs non-aero frames in addition to wheels.

For me the only real potential downside of an aero bike is less comfort on long events. That's the only reason I prefer my Endurace over an Aeroad. A lot of the pros just ride their aero bike everywhere and tests like this show why.