Your QuikStem should last indefinitely. We have QuikStems in heavy use applications that have been working flawlessly for almost 3 years.

Thanks for your comment. We do have the stem for you. The valve in this video is for tractor and big equipment tires. Your dually is most likely a .453" valve stem hole. Hit QuikStem.com/where-to-buy and you'll see multiple options. The best deal in a twin pack (one for now, and one so you're ready next time) is at Hardline Products QuikStem Tire Valve Stem - QS-1 www.amazon.com/dp/B07MQFZMXK/ref=cm_sw_r_cp_apa_i_.5RJCbX66GJZ9 Let me know if you have any questions.

Yes. If the stem is otherwise intact, as it generally is, the rubber grommet is replaceable. While we don't have them currently for sale because they need replaced so seldom, we can get them if needed.

I'm sorry we haven't gotten to black yet. That may well be coming in the future. In the meantime, you can put a shiny stem in there and drive to the shop for a black one, or I guess you could wait for the tow truck. We certainly hope to keep you styling, but mostly we just want to get you off the side of the road and back to riding.

Hey. That's a great question, and believe me, we're working on it! We've just signed new deals that ought to have QuikStems popping up in local feed stores all across the country for our farming customers, and we're already working with A&I Products who services all John Deere dealerships and service centers as well as thousands of other equipment dealers across the country. So check your local tractor and equipment dealers and one might very well have QuikStem in stock. There are also one and two day ship deals on Amazon Prime from Hardline Products for .453" stems. But, even your nearest local store does you little immediate good when you're broken down offroad somewhere, which is why we say You Need It BEFORE You Need It! So we suggest you get some now wherever you can and have them in the toolbox for next time. Thank you for your business and your note.

Are you having trouble getting the dust cap off of a QuikStem? I've never heard of that before, but I guess it's possible. If it was really stuck I'd probably hold the barrel with one set of pliers and turn the cap with another. Right tightly, lefty loosey.