Phill P wrote:
Yes the wheel is strong enough with 1 hole drilled for the valve. But the reason you don't hear of rims failing at the valve stem is because they don't crack there, they just fold under a combination of compressive loads and spokes loosing tension.
The less stiff you make a rim, the less it distributes loads to the spokes, and the more likely it is to fold. This is why lower profile/less stiff rims typically have more spokes.
If you go drilling holes in the rim you reduce the integrity of the rim and give the rim more points to bend at both laterally and vertically.
If it were a good idea don't you think somebody would have tried it years ago and the idea caught on? Somebody might have-but they probably died before telling anybody about their great new design!!
Don't you think it is a bit harsh to say ''Somebody might have-but they probably died before telling anybody about their great new design!!''?, I would say fatality rate would be less than 1 out of 10, leaving at least 9 to tell the story.
If it were a good idea don't you think somebody would have tried it years ago and the idea caught on? - Perhaps I am a genius compare to all others.
More seriously though, I am looking for answers with legitimate technical idea/experience on the subject. If I could convince the industry experts here, I would try it out myself. In fact, I have done drilling holes at the upper bridge of a Ambrosio exellight rim of a front wheel for years without any problem at all. However, the wall thickness of the upper bridge is not thick so the weight saving there is little.