36g Ultralight 700C Bike Inner Tube TPU Road Bicycle Tire 28'' 700C Bike Tube Compatible with 700x18C/23C/25C/28C/30C/32C Valve Length French 65mm (Include 4 PCS Bike Inner Tire Patch Repair Kit)

I bought 2 just to give them a shot and I am very glad I did! They installed very easy in fact I feel they were easier than the butyl tubes they replaced. I have 4 rides and about 90 miles on them, the ride is great, not harsh or "dead", great road feel. steering is faster since there is less spinning weight. Non-performance related but my tires (GP-5000's) now "sing" on the pavement much like my old Conti Sprinter 250's tubular tires used to sing, love it!

These tubes are lightweight, extremely durable and hold air well. I have used these tubes for a year now and have been very pleased and feel confident riding them. I did go through a learning process. They must be installed properly or they will likely fail. If you use a tire iron you will pinch the tube. I have ridden thousands of miles with stellar performance. They don’t seem to hold pressure higher than 80psi, I run 80 psi in the rear, 70 psi in the front and rarely need more than one or two pumps to top them off. I carry two extra tubes and an inflater which are a lot lighter than any other tubes. The cost is less than the Michelin ultra light tubes I ran for 20 years. They feel a little stiff but I am used to them now and won’t be going back to rubber or latex soon. Bottom line I have saved a lot of weight, gained some speed and feel very confident that these with my Grand Prix 5000 are the best combo for me.

Now carrying spares made sense. Not bulky tubes. Easy for replacement. Along with my portable pump.

I've bought a couple of them and I'm very satisfied I got a flat because of a little staple but was really easy to fix it!Note: read well the instructions "need 30min. to make the adhesive work well" so I changed the tube on the street then fixed it at home, then I reinstall the tube fixed already and works perfectly!Definitely a good option for TPU tubes.But isn't recommend try to patch it and use it instantly

Bought 2 and within 1 week first one developed a slow leak, tube got warped and stretched out looking for the leak. The tube not safe to put air in when outside of tire. The second tube already had a hole and had to patch it. Tube is lightweight and takes less space than butyl rubes. At more than double the price of butyl tube even with discount is not worth it because the tube is not as durable.