Originally Posted by merlinextraligh

There has been some, you can google it.


The difference is getting better, and I think one Specialized bike claims almost no difference.


But if the whole purpose of this endeavor is to be able to use carbon rims, the aero advantage of carbon rims over a decently aero aluminum rim is going to be pretty small, so anything you give back on the disc is likely to make it a wash.


I'm not arguing that aero drag is a major reason not to runs discs, I'm just questioning what you're accomplishing if the purpose of running discs is to allow you to use CF rims.