Qtubes makes a pretty solid tube - durable and light. If you're going to use a deep dish, don't hassle with valve extenders. You have to believe that valve extenders are going to leak, theyre a pain to change when you flat, and there's really no reason to use them. If you know you're going to ride a set of zipps or hed jet wheels, save yourself some trouble and get these. Total lifesaver.