mpulsiv wrote:What about Boyd Alamont? Shape looks like a copy of FLO 30, as aero as it gets.
http://www.boydcycling.com/2016-altamont-alloy-clincher]
Thanks, but we definitely didn't copy anybody on the shape. In fact, the widest part of the rim is the brake track whereas with the Flo rims it keeps getting wider down the rim.
I have not had a chance to compare both in the wind tunnel with the same tire so I can not say for certain which rim is more aero. However, I do know that with a torroidal shape (where the rim continues to get wider away from the brake track) you really have to beef up the wall thickness. Otherwise when the spokes pull on the rim it would change shape into more of a V shape. So, with this shape we could keep the same strength, and reduce wall thickness for about a 90 gram savings per rim over a torroidal shaped alloy rim.