Review on 🚲 TAC 9 Tube for Bicycles - 700c x 18-23, Presta Valve, 32, 48, 60 or 80mm Length - Choose Valve Size and Money-Saving Option in 1 Pack or 2 Pack by Michael Caste

Pros: Reasonable price. Page 18-23 is not always easy to find. Useful instruction card. US company owned by a retired US Air Force. Disadvantages: So far 2 out of 4 tubes have failed while stationary. Not all sizes come with an optional threaded Schrader valve. I bought 4 of these tubes and installed 2 in my fix that has sat for a couple of years. Although I have a lot of experience, I followed the manufacturer's recommendations for installation and carefully checked the tire bead several times during the inflation process. I even underinflated the tires by 5 pounds to be on the safe side and used baby powder in the tire to reduce friction. My wheels have a rim stripe and no visible burrs. I tested the bike for an hour without incident. An hour into the ride, a tire blew out while the bike was idling in my garage. 48 hours later, the second tire burst - and there were no more trips in between. Both chambers ruptured at what I would call the center of the side facing the rim, and oddly each ruptured about 8 inches from the valve stem. It's amazing how similar they are considering they were on two different bikes. I bought 4 and replaced them and the new tubes are fine in 3 hours. Unfortunately, now when they leave I don't have any backups. I hope it was just an accident. the regular mark doesn't make 18-23. **Update in 10 days - Second set of cameras holds after the weekend with no off-road or off-road incidents. I still think the first kit I opened was defective. Unfortunately I can't rate it higher or recommend it because of the 50% hit rate.