Originally Posted by BostonFixed
and aero rims will be slightly 'stiffer', because of the extra rim material, which may or may not make the ride harsher.
You can always compensate for the aero rims' stiffness by using a butted spoke though (even one with a 17 guage center)
In fact, Jobst Brandt would say this is a more durable combo than a lighter rim with thicker spokes.