Originally Posted by
alanbikehouston
In a one hour time trial, a guy riding 30 mph could save several seconds with aero rims, if there is no side wind.
This makes it sound like the benefit from aero rims would be less with a cross wind. In fact, more time is saved in a cross wind than a direct headwind. Several wheel and frame manufacturers are now designing their products for optimal performance over the wind angles they believe are most common.