usernameforme wrote:most aerodynamic rims these days have a 23mm or wider profile. This is to create a smoother transition from the tyre to the rim. Since your rim is so narrow compared to these rims, there isn't a smooth transition of airflow and the air "separates" at the tyre. I've got a diagram of this somewhere that I'll post when I find it
Instead of attacking my claim, why don't you provide your own evidence and prove me wrong?
Ok so since you can't substantiate your first claim that 20/24 wheels arn't reliable for a rider over 75kg you're turning to aerodynamics now?
I'm going to assume that your claim is based on your own experience with the wheels you are building yourself and I'll leave it at that.
Some brands are pushing wider rims, others are not. The aerodynamic differences between standard width and normal width rims I understand are small, maybe immeasurable since no-one is particularly keen to publish their wind tunnel data on the subject.
Wider rims are more about increasing the air volume in the tyre - something you can do by going up one tyre size on a standard width rim.