Originally Posted by tempocyclist

Long valve stems are totally un-aero and are the reason you're not winning the traffic light sprints...

Check out the INEOS marginal gain of hiding most of the exposed valve stem with a detachable deep section wheel cut-out thingo-ma-jig.



Photo from - https://cyclingtips.com/2021/05/fili...tom-paint-job/

But in all seriousness, as long as you have enough valve stem protruding above the rim so you can attach your pump / C02 inflator you will be fine. Make sure your spare tube does too!