Well, my non scientific results showed me a few things when I put on some Rolf Vector Pros, high profile rims with minimal flat bladed spokes. They replaced some Mavic Open Pros 32 spoke wheels. My average speed was about 1 to 1.3 mph faster or so said my cycle computer. They got up to speed faster, or so it felt, they seemed to make me faster rolling down hill, particularly in a tucked position. I found that I could roll up on and pass a similarly sized rider who was pedaling. The down side is that the ride was a bit rougher with the high profile rims than with the low profile rims.