Continental 42mm Presta Valve Tube

I've tried a lot of bike tubes, and these are my favorite. They are sturdy and well made and I have not had any problems with them splitting at the seams or at the valves as I have had with some less expensive tubes. The presta cores are removable, unlike some other brands. This is a slight downside if you use a pump such as the Lezyne brand which screws on...over time you may pull out the valve core resulting in a big Whoosh! It's easy to screw back in using a valve core tool NoTubes Core Remover Tool , but some people don't want the hassle so they glue the cores in. I like them removable on the theory that if a valve core dies I can simply replace it with a new one (I have some spares as they are sold separately) without having to throw out the tube. This has not happened in years, but the thrifty in me likes the idea that I could.

Good tubes. High quality and a good value for the price. The stem is high quality and doesn't bend easily like other brands. This is important to me if i need to fix a flat on a ride with a little hand pump. After reading some of the lower ratings for this product, I think there are a lot of people out there who do not know how to properly install a tube on a road tire or understand the importance of inflating to an appropriate pressure. The pressure rating on your tire isn't just a suggestion. If you under inflate you run the risk of getting a pinch flat eventually. If you pinch and pull the heck out of the tube or stem of the tube getting it in you probably gave yourself a flat before you even finished fixing the last one. watch a couple YouTube videos and read a bike maintenance guide, attend a clinic, or have an experienced cyclist teach you how.

What can I say...it is a tube and holds air. I did have 1 out of the 5 tubes I had here that already had a pinhole near the valve stem, but I can't really do anything about it since there isn't free return shipping. Plus, I doubt continental will do anything since there are a lot of stupid people that undoubtedly puncture their tubes while installing. I wonder if that isn't what happened....as in maybe someone had a couple that they damaged and returned....oh well, I'll just buy them locally from now on. All it takes is one messed up order on something like this and your savings are out the window.

Great tubes. Ordered 4 to install two in new tires and have two spares. Be sure to test before installing. One of my tubes had a puncture and I didn't know until after I installed. Just ordered another one. Trashed the punctured tube and forgot to return it. Good tubes to go with my continental 500 tires. Very smooth ride. Rides Benz kinda smooth!

I had to replace a flat several weeks ago, so I used this tube. Since then, I have placed maybe 350-400 miles on it, and so far I have had no problems. I put my road bike under some abuse (potholes, broken glass, rocks, etc.) and so far, so good. Note that I check my tire pressure before EVERY ride and make sure it's 95-105 PSI. Also make sure that the threaded washer is screwed on tight against your bike's rim, so when you're trying to inflate the tube, you don't accidentally jerk or push the valve stem into the tube. The only thing that surprised me was that the valve stem is in two parts... one part of the threaded tube connects to the tube itself (as you'd expect) and there's a second threaded tube that slides into the first tube I just mentioned. Sometimes, when unscrewing the black dust cap, you can accidentally unscrew this secondary tube, and totally deflate the tire. As long as you avoid doing that, you're good. These tubes have worked extremely well for me so far.

I bought two of these for my Schwinn road bike (700x25c wheels). I had been having problems with my rim tape, so I finally got that resolved. When I mounted these tubes and started inflating them, there were no pinches or twists in the tube or between the tube and tire, but the tube was not inflating evenly. I continued pumping until the tire was firm and consistent (I rolled it around on the bike a bit to level it out and set the tire bead in place before going past 20 psi) everything pumped up and seemed fine with the first one (on my front tire) and I set out for a ride with my rear tire pumped to about 90 psi (this was a bell tube I got from walmart) and the front was around 80 psi. The front tire wore flat within 5 miles. When I pulled it out I noticed that there was a ring opposite the valve stem. When properly inflated, the tube had a low spot because of the extra reinforcement around the valve stem area, causing the tube to bulge and rub against itself causing the flat. I noticed this on the other continental tube I had purchased and took it for a shorter ride and used lower pressure, hoping that would resolve the issue. At 50 psi, (keeping in mind the tires are rated for about 110 psi) the tube rubbed itself through in 1.7 miles. I will not be buying these tubes again. Perhaps if you have a mountain bike, their tubes are better at lower pressures, but the road bike tube that I used needed to be higher than 40 psi just to keep the tire from riding too low. You might also factor in that I'm a bigger guy at 230 lbs, but it was clear that the tube was either defective or poorly designed or marked.

These are the tubes I usually buy. No problems. Valves work well. No leaks. Lots of potholes here on Long Island (maybe if our taxes were higher they could fix those :) ) and the only flats Ive had were from getting distracted and blasting over one - cant really find fault with the tube for those. Going tubeless seems like too much trouble at this point. And, yes, I'm bored and rambling.

Super.

alles o.k.

Good quality, fit to my kids 650 wiggins

Siempre me ha transmitido confianza esta marca, que en neumáticos de coche es de las más caras y con más prestigio y en este tipo de cámaras de bicicleta es de las más baratas, pero su marca es una garantía

Needed to replace a tube on the fly on the side of the road. Really good tube and no issues with it after 500km of riding.