Tubolito Tubo 700 X 30-40mm PRESTA TUBE, 42mm VALVE

I'm looking at other reviews and wondering why they put so much air in them just to 'shape' them for fitting - not surprised they 'expanded' like a balloon and failed. That's not how you treat them.I've used latex before so I know that to get tubes like this to work takes great care when fitting. Inflate but only just to get them in shape - do not put excess air in. Fit as normal and then when you're putting the last bit of bead over, deflate them to make that bit easier.First inflation - just do this to make the tyre bead seat ('popping' sound). Once seated deflate and then reflate to the required pressure. As the valve stem is plastic do not put any excess weight on it - so inflate with the valve at the bottom so the pump head isn't bending the stem.Things to watch for. Your rim valve hole - make sure there is no sharp edges that could cut into the valve stem.I'm running mine on a CX set up 35c. The old tubes weighed 146g. These weighed 58g. So the benefit is real and worth it.Ten rides of 21 miles each - no issues. 5 miles of that is off road on sharp road chippings.In 2 weeks they have lost 1 bar - that is epic compared to a normal butyl tube. Latex would lose that in a day.I still don't trust them enough that I still carry a butyl spare with me - but I was carrying that anyway.My road bike will be getting these next - and that will be a challenge as the tyres are quite tight - and that's where I reckon the biggest risk is. Fitting them. They are gossamer thin and if your a brute with them you won't even get them on. But if you do get them on the change is like buying £2k wheels!

I had a slow leak in one of my inner tubes and when I took the inner tube out I put some air in it to find the hole and then it blew up in one spot and ruined the tube then it did it again on the replacement tube I had in the same day!

Durable replacement tube that is ideal for gravel riders when your tubeless tire suffer a major blow out! I keep one of these tubes with me at all times for that rare, but ride ruining, tubeless tire major failure. With a major failure, you will often need a very durable tube to get you back to where you can properly repair/replace the tire.

Muy caro y se ponchó muy rapido

Chambres à air poreuses !Inutilisables à l’avant comme à l’arrière dès la 2è utilisation (après plusieurs semaines de repos forcé suite au confinement)

The price of these are insane. But even at this price, if they work and are durable, I would call it a win.Unfortunately, every Tubolito that I have tried (6+ across gravel, touring, and MTB) have failed.In super-thin tires designed for a supple ride, these tubes made them feel like hard plastic. And in normal MTB tires they also made for a very dead feeling with little/poor feedback.In-use, every tube I have used has failed quickly. Some in minutes (half-hour after installation), some in days. But they all fail. Most failures are due to the bond failing where the tube is constructed. Others are due to very minor punctures that should not have been an issue, especially given the description of being more puncture resistant than normal tubes. This is not true.Also, once punctured, it is impossible to patch reliably. I have tried to fix several tubes with the recommended tubolito patches, as well as more traditional/reliable patches. None will stay leak-free. They all eventually fail, as the material does not accept adhesive well, and does not stretch well.DO NOT BUY. ABSOLUTE WASTE OF MONEY.

Per ora molto positivo, materiale leggero, con basse pressioni non ho pizzicato .