With one caveat, I’ve been having great success with TPU inner tubes. The one issue is that TPU tubes with an all plastic stem are prone to slow leaks at the valve core. They look like this -
The fix is to back the valve core out, apply a glue like Pliobond only to the valve threads, and then reseat it.
Better yet, get TPU tubes that have a metal valve seating area that look like this -
Thanks, will keep in mind! I do have the cheapo plastic ones.
How bad are the slow leaks?
Better $ brands, less likely?
Those look like Magene?
I’m considering - Pirelli P Zero Smartube EVO Performance TPU Tube – Crooze Australia
Onyl sizes are 60mm and 80mm… front wheen is 60mm deep and back is 80mm deep… I’ll need extenders? 
If that stem is black anodized aluminum, GOOD - if it’s plastic, it may suffer from the same issue as lesser brands.
IMHO, most of the TPU issues of them slowly leaking air is caused by air leaking right at the base of the presta valve where it screws into the plastic stem. Pump up with a little air before installing and test it in a bucket of water.
My 2c: I have RideNow from AliExpress and never had any issues. Not sure if its worth spending more money on the branded ones. They have one with metal stem, so work well with extenders
I use the RideNow tubes too. No problems.
Ditto
Ride now has the all metal valves. They have been great
Why use TPU over Latex?
I understood Latex test faster and are inexpensive now.
Latex leaks air. TPU is more practical because you don’t have to pump before every ride.
Latex tubes are at least double the price of the RideNow TPUs. Plus easier to carry and can be used for a flat change.
I am going to stick with latex tubes.
Same here. They are the fastest option, and I top off my tires each ride anyway. The rolling resistance of TPU tubes varies depending on the thickness; from almost as good as latex to almost as slow as butyl. ( TPU Inner Tubes Test | Bicycle Rolling Resistance )
TPUs make a LOT of sense for flat kits since they are light and pack so small.
I tried the switch recently. Bought TPU tubes from Rene Herse, with metal valve stems advertised specifically for avoiding the leaking valve core. I ride at 95 psi. First long ride, the rear tire started feeling squishy, but looked ok. Next day I went out and both tires were at 60 psi. Today I pumped up to 95 psi, did a 4 hour ride. Again, the rear felt a little squishy about half-way through the ride, but was ok. I checked at the end of the 4 hour ride - both tires were at 80 psi. Still ok for riding, but the leaking worries me. I took the rear tube out and pumped it up and put it in a sink full of soapy water - didn’t see any bubbles around the valve or anywhere else, but wasn’t expecting much for a slow leak.
This isn’t what I was thinking would happen. My Schwalbe butyl tubes easily last a week with no worries. I don’t mind pumping tires up every day, but it’s not my preference. I’ve got the TPU tubes as spares in my seat bag now.
I’ve got the new RideNow TPUs with the metal stem ($23 for 2 on Amazon). They lose air a lot slower than latex, but do drop pressure faster than butyl (~10psi in a week).
FWIW, I ride at 90psi rear (25mm) and 95psi front (23mm). I tend to be prone to pinch flats so I top up my tires before each ride regardless of tube type.
I went tubeless on my primary wheelset because I have genuinely awful luck with tubes. Butyl or TPU, doesn’t matter. At one point before I went tubeless I literally went two months with a puncture on EVERY SINGLE RIDE. But the reason is entirely where I live. I live in a rural area and the road surfaces can be quite poor with lots of debris on the shoulders.
I do run TPU in the bike I keep at my mom’s house out in Florida. I have not had a failure in one of those tubes. But then again, I also haven’t had a failure with a butyl tube out there either.
Are you using valve extensions for deep wheels?
For me it was very slow leaks from the extension and with a bit of teflon tape between the valve stem and the extension my tires hold pressure for a very long time.
How about latex tubes?
Besides costing way more and are more finicky to deal with?
I run latex on my road bike only because I have a bunch of tubes lying around. Otherwise, I can’t see myself buying latex over TPU ever again.
Butyl tubes on training wheels
Latex on race wheels
I’ve never used latex so I can’t comment. I picked up some TPU tubes just to try, and also to keep on board for roadside repairs. I wasn’t terribly impressed with them as the primary tube/tire set up but they are light weight and easy to pack in a tool kit so I have at least one on every bike just in case.
