Berodesign

What is a aerodynamic shape of a rim? Is it as I suspect when the rim is "pointy" towards the hub in opposite to those that are flat? And how big difference does it make to have a aerodynamic shaped rim? Some say it is alot more important then weight at flat terrain and in high speeds. Sounds resonable to me, any other opinions?

sydney

Just as an expample, mavic open pros are considered non aero. CXP33s have an 'aero profile' but really are not considerd a true aero rim, because they are not deep enough.

Berodesign

Haha, wonderful Sydney... it is actually between those two I am choosing.
I'll go for the CXP33 unless Mavic got some 36 hole rim.

By now I better put a small plate on my roadie saying "With a special thanks to Sydney, without who this bike would never been born" You are really helpful!!!

galen_52657

The most 'aero' rim is no rim at all.... a disk wheel. Otherwise, an aero wheel has a cone-shaped, deep rim and reduced spoke count and blade spokes. You can spend a lot of money on aero wheels...but if you possition is poor on the bike, the wheels will be of little consequence. Your body makes up much more of the total frontal area than the wheels.

TimB

rider position is more important than aero wheels.
Low weight wheels also help acceleration and hill climbing