We have the alcoa wheels so they have the steel wheels on the inside. I put 4 inch extensions on the inner stems with a small dab of locktite to keep them on. have worked well in the 5 years we have had the setup. Only problem is that tps will NOT work with the extenders. Bought some of the long stems from the tire guy in kalif, just have not been able to get over to the tire shop to get installed so I can use the valve stem tps I bought. if using the locktite get the red 222 which is a low strength one or 242 which is medium. Just dont get carried away with it so it does not get into the valve core.