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

Good quality and perfect size

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 !

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.

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!

This tube was punctured by snapping the tire onto the rim. I have been cycling for many years, and never have I seen a tube puncture so easily. I really needed this to work and tried patching it four times before even inflating the tube. I had to give up. Don't waste your time.

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.

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.

The top of my valve wasn't screwed in properly which lead to a leak after installation. (Not the part you screw/unscrew with your hand, the piece directly below that which screws into the main stem. not sure what it's called).Wasted some time removing the tube checking for holes. Maybe it was a noob mistake... hope this saves somebody some time.