I just got off the phone with Dan from Hoosier in Manchester,Ct. I asked him what he thought about running tubes WITH the QTP's. He said the ONLY reason Hoosier recomends tubes with the QTP's is because over time,air will leak out.If you are going to race the car all the time,you should NOT run tubes. He said you can,but it is better not to run the tubes when racing.

What I have found with mine are, if my car sits for a long period of time,they go flat but if I drive it 2-3 times a week,they dont.