- Traditional butyl rubber construction with Presta valve
PROS: Long stem, Great price, Tube seems to hold up
My tune changed after I had some tubes that developed slits near the base of the valve stem and couldn't be patched, and some had slow leaks from the start, forcing me to pump air into it before every ride. I couldn't find the leak, even using the underwater test; it just was covered with tiny bubbles that stuck to the tube. I was spending so much on tubes that it rivaled the amount I spent on gas for my car. It was so bad that I was willing to spend a lot to go tubeless.
Tubeless wasn't without faults. It was so unreliable that I carried a spare tube. JensonUSA recommended me these tubes, after lending an ear to listen to my frustrations. They said that I could unscrew the valve core and inject stan's sealant into the tube, if I wanted extra insurance against punctures. I had the Stan's already...
One day I put this tube in as a spare to ride home, after losing my tubeless tire's seal, and left it in. It, surprisingly, lasted *months*! My issues with flats pretty much became far more manageable with a simple switch to a reputable brand name tube.
I learned the hard way that tubes are not all the same and that these Q Tubes (repackaged Kenda tubes) are probably the cheapest and reliable tubes you can get. Buying tubes and cheaper and you are going into the zone of hit or miss tube quality.
PROS: Holds Air Reliably, Good Stem Design, Easy To Patch, Removable Valve Core
PROS: Easy To Regulate, Good Stem Length, Puncture Resistant, Lightweight
BEST USES: Road Biking, Casual Riding
I would say it's a "luck of the draw" tube.
CONS: Punctures Easily
BEST USES: Mountain Biking, Casual Riding
CONS: Unclear core description, Needs a removable core
CONS: Explosive valves
Q & A
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