I'm using these Ride Now TPU tubes on my road bike clincher tires. I had an issue with one tube leaking air from the valve stem. I tried replacing the presta valve, but I was still getting leaks. I ended up putting a very small amount of tubeless sealant in the tube to seal the leaky valve. Not sure if that was the best thing to do, but it worked and now both tubes are holding air just fine. Though this is probably the last set of clincher tires I will use. All my other wheels are now tubeless, but with these TPU tubes + my clinchers, the weight actually comes in lower than running the equivalent tubeless tire.
BTW - I bought this 2 pack + patch kit deal from this
seller on AliExpress. The tubes arrived to my door in under 2 weeks.