Valve extenders seem like a solution in search of a problem. Whats the real benefit of adding more length to your valve stem? Is it just about making it easier to inflate your tires or are there actual performance gains to be had? Ive heard some claims that extenders can improve aerodynamics by allowing the valve to be tucked in further, but that sounds like a bunch of hot air to me. Can anyone whos actually used these things chime in and share some real-world results? Are they worth the added weight and complexity, or are they just a bunch of marketing fluff?