Continental 60mm Presta Valve Tube, Black, 700 x 20-25cc

Unfortunately there wasn't an option for choosing 700 x 20-25cc 42mm valve stems; ended up receiving 60mm valve stems despite needing 42mm. I suppose it's better than receiving 42mm valve stems and needing 60mm. Running around looking a bit goofy, but won't knock it any stars for that as the product functions just fine. I've not had a chance to ride long distance with these (rode approximately 100 miles so far over the course of the last few days), but Continental's track record has been good as a whole so I'm confident that if they didn't blow up within the first 100 miles that they're good.

The first inner tube I received had a hole in it, and when I went to return it, it was super easy to process a replacement and everything was great from there!

Had a flat on my first ride due to a defect in the tube's construction. Very uncommon for Continental. Other tubes have been flawless.

nice tubes, i have read alot of negative revews on these tubes yea there maid in china , i have used them for years and years and have ride thousonds of miles on them an countless tours and i have never yet seen one faulty out of the box or had an issue with one ! my advice is if you do not no how to install a tube take it to someone who does your blambing a tube for your error your pinch flatting them or these cores are removeable and yess i have kneeded to tighten the core out of the box , but to check tightness on that apon install is comon practice in any shop on any tube out there !

This tube split at the seam directly behind the stem, so it appears the tube was defective. I installed the tube last Tuesday, inflated to 110 psi, and rode 27 miles. Two days later, getting ready for the next ride, checked air pressure and it was only down to 90 psi. Great news, so I pumped it back up to 110 psi and rode another 23 miles. The next day, getting ready to ride again, the pressure was at 45 psi, not a good sign, but I pumped back up to 100 psi and started on a 17 mile ride. Luck was on my side as the tube survived until 16.7 miles into the ride, so I just walked the final few blocks rather than doing a roadside repair. The tire had a tuffy liner, and I thoroughly checked all parts of the rim, tire, and tire liner that could have rubbed or poked the tube and found no offenders, so my diagnosis is that the manufacturing process did not seal the seam adequately. I won't buy these again.

It's a little early for me to draw a complete conclusion but so far so good. The tubes were pretty easy to install after adding just a bit of air. It seems as if the fit to the 700cc wheels was perfect for installation means. I've had a couple other brand tubes where the fit was less precise... a bit sloppy and made seating within the tire and beading to the rim a bit more difficult than it really should be. No such issues here. The presta valve may not be any different than other tire brands, but I found them to be just a bit more substantial, especially the valve itself, where I have broken a couple others when not being as careful as I should. We shall see about durability but I suspect it will be fine.

I got a flat tire on my bike, so I ordered a pack of these valve tubes. I was able to change out the flat and install a new tube. This happened several months again and I haven't had any more flat tires since then, which shows reasonable durability of this product already, and it will likely last a good while longer. This product was also offered at a fair price, so I would recommend buying these. Pay attention to what size valve tube your bike has before purchasing.

Purchased the 700 x 20-25cc for use with the Vittoria Zaffiro Pro Home Trainer Fold Tire (Red, 700 x 23) and it worked out perfectly.The valve on this tube does unscrew itself when using a "Presta Valve" pump adapter so it's best to use a pump that doesn't require an adapter to fill up the tube. You just want something to connect, lock, pump and then release to avoid this issue.I got this for my bike trainer setup.