2/4 Pack Ridenow TPU Inner Tubes 700 x 18-32c Bike Tubes with 45/65/85mm Presta Valve

Much lighter than butyl tubes and has lower rolling resistance. Another benefit is it takes much less space in saddle bag but be sure no sharp object pushing against it as TPU tube is quite thin.Had two TPU tubes in road bike for a full season (around 75psi with 28mm tires) and no punctures (usually only average 1-2 punctures each year) so far. They hold air as good as butyl tubes and I do check tire pressure before every ride.

I haven't ridden on these too long, so I can't speak for durability, but I'd expect it to be the same. That being said, I found installing these to be easier than standard butyl tubes because of their bright color and slippery material. With 25mm wide wheels (18mm internal) and 25mm tires they went on without any tire levers. Each wheel felt a noticeably lighter after installed, as did my spare kit, which also has more room now that the butyl tube has been replaced. I'm not going to say it made a crazy difference, but my bike feels a little more nimble and responsive now. I may be wrong here, but it seems like my bike is much quieter with these tubes installed. I've never heard anyone or read anything mention that with TPU tubes, but it was one of the first things I noticed. Edit: after a 60mi ride in the Tour de Houston, they survived the rough roads flawlessly. I had no punctures even though I had the tires aired down a little for the rain. It's hard to say, but they do seem like they roll easier than my old butyl tubes, especially when going around 20mph or faster. Strong, heavy pedal strokes seem to result in less "whoosh" noise and more towards acceleration.

My only criticism of these tubes is the lack of thickness. Other than that I am very satisfied with these products.

Definitely huge gains from replacing my tubes with these ones . Fast , smooth , and rode over 1000 miles without puncture .

They get holes like any other tubes when punctured but these things are so small you can carry multiple in the same space as a butyl tube.

These are nice for a time trial or race or group ride once in a while but not good enough for daily riding or training. They just do not hold air longer than 12 hours or so and after three or four rides every one developed a slow leak. I replaced my rim tape and made sure everything on the rim and tire was smooth but they still got slow leaks even though I was very careful to avoid pinch flats during installation. Michelin ultralight tubes do just fine. DO NOT USE A CO2 INFLATOR with these. The plastic valve stems will crack when cold.

They hold up very well. A little more care is necessary during installation to avoid a pinch flat. Also I found that it is a good idea to put some rim tape down first. Twice I installed tubes on rims with factory ready tubless strips. Both time flatted on strip side of tube. Took factory rim strips off and replaced with rim tape. Have not had any issues. They do lose air overnight. Usually a couple psi. Less loss than Latex though. These are my goto tubes.

I only use these now