Continental 42mm Presta Valve Tube (2-Pack)

I have ordered a few of these tubes. I ride every day about 25 miles a day. One of these tubes generally lasts me about 400-600 miles or basically a month until I get a flat and need to swap it out for another one. It could be a little more durable but otherwise a good product. These would probably be great for people who only ride maybe 100 miles a month or less then it would seem like they last forever... who knows?

I could have used the shorter stem for my Alex Ace 19's but the longer one won't hurt. Might even help a bit if I get a flat.I bought 'em cuz of price, a known name, and how fast they'd arrive.These seem fine, & fit well in my 35mm Conti Contact Urban.

Ordene la versión Slim y me llego Wide, pero buena calidad

I thought this product was made in Germany, however, just like on the United States, it is made in China.I have installed the item and it does a great job.I bought a brand new street bicycle and the tires were flat. I tried to put air into the inner tube and the inner tube would not hold pressure above 20 psi.I bought two new inner tubes and those inner tubes would not hold pressure .I bought two new inner tubes with the presta valve stem and those inner tubes did hold pressure.I did not check my wheel thoroughly enough and two days later I had a flat tire due to a burr on the inner side of the wheel.Meanwhile, I had contacted my warranty company and I was sent two new inner tubes which did not hold pressure either.And I hit a blackberry branch which was on the trail because someone was doing trail maintenance and got another flat tire due to a thorn form the blackberry branch.So,I have had my share of bad luck and hopefully I will be good to ride.

These tubes were easy to use and have had no issues so far. Rode a few hundred miles at this point.

Overall the build looks solid. I love the zippered pouch perfect size to fit all my tools. I like the rolldown top so it changes its size depending on how loaded it is. And I like the massive capacity if I need to do grocery shopping.Buuuut I wish it had a few more things/differences. I would loooooove if there was a strap somewhere I could hang my U-lock on. That's the most common thing I access from my bike supplies and because of its weight it always settles on the bottom of everything in the bag. And the side straps are mounted too high up for normal loads. If you fill it completely it looks like the picture, But I keep it at 1/2 to 2/3 full for regular use and I can't sinch down the top because of how how up the straps are mounted. May try to glue on rings or something lower down so I can take up the extra slack.Not sure how well designed the pannier hooks are. I've used other bags with both locking and non-locking hooks and they seem more secure then these, had the bag pop off my rack once when hopping up on a curb.But I'm gonna continue to use it as its mostly just what I need and feels like it'll last a while.

These tubes have the Presta Valve and I knew that when I ordered them. I already have a pump equipped with the Presta connection and it took a little time for me to figure out how to fill them, but once I figured out that you have to loosen up the top part of the Presta valve, everything went well. No problems with the tubes yet and they fit perfectly.*** UPDATE *** One of the two tubes started to leak at the valve connection of the rubber inner-tube. I had to trash it. I hate the Presta valves! I will be ordering another tube but with the Schrader type valve from now on. I found it very difficult to put air into the tires with the Presta valve because most pumps, even with the Presta fitting, do not stay on the valve.

Great tubes. In my opinion, if you have an issue with these tubes... It's user error. Make sure you put some air into the tube when you start the mounting process. Not a lot, just enough for it to fit up into the tire. Not too much. This will keep the tube out of the way of your mounting tools. Don't use a screw driver... Use proper tools. Also, when using the presta valve tubes, once you have the tube set up inside the tire, tighten the stem nut down. This will keep the tire from shifting when you mount it. Just tighten finger tight. Don't get animal on it. Make sure you have the right size tube. If you do all this, the tubes work great and last a long time.

Muchas gracias!

excellent product delivered on time.

Exactly as described