Kenda Bicycle Tube, Schrader (American) Valve, Multiple Sizes

Great value

The box is slightly larger than the Q-Tubes version, and uses a glossy ink on normal card stock. I didn't take calipers to it, and I didn't weigh the tube, but the Q-Tubes version was 143g for a 26x1.5-1.75 (ISO 40/47-559/584).These are thin and lightweight compared to Avenir. They're lightly dusted with talc to prevent sticking.The price is great, among the best on Amazon. This is presently available Amazon Prime, and ships/delivers very quickly when ordered that way.These fit/stay in the tire better than the Avenir.These are not thorn resistant, but should be great for urban trails and roads.* If you need protection from thorns, a heavier tire is probably best.* If you need protection from glass or nails, then you'd want a Kevlar belted tire.As long as you install them properly, these should work fine:A) Inspect the tire inside and out for any thorns, cuts, nails, or damage.B) Remediate any tire problems, which may mean cleaning, removing junk, patching, or replacing.C) Inflate the tube just enough for it to stay round when holding it up by the stem.D) Fit the tube into the tire. It should not expand or obstruct the bead.E) Fit the tire onto the rim, starting with the valve stem.F) Hand or foot inflate until the bead seats.G) Squeeze the bead all the way around to make sure it's not slipped anywhere.H) Continue inflating to half of the desired pressure.I) Re-check the bead to make sure it's not slipping loose anywhere.J) Make sure you can bounce the tire, or mash on the tread with your palm.K) Finish inflating to somewhere between the tire's printed minimum and maximum pressures.Regarding pressure, use the lower end for rough trail, higher end for smooth pavement.Some people go outside of the rated pressures, and this CAN be okay sometimes.Too low, and hitting a bump could cut the tube.Too high, and the tire bead could slip off of the rim, causing the tube to burst.There are variances too.* If your rim is too small or too large, this can affect safe pressure ranges.* If your tire is old or damaged, then it won't hold as much pressure safely.The ratings on the tire are based on average conditions, so a new tire, on an over-width rim could take higher pressure, etc.YMMV, but I find it's usually best to follow the recommended pressures, and if you need something else (softer, or harder tire), then use the proper replacements rather than going out of spec.Lastly, ALWAYS WEAR A HELMET. Your brain is important, and CPSC approved helmets protect your skull from impact fracture.If you can afford a MIPS or AIM helmet (technology, not brand), then those are even better and protect your brain from sloshing as much on any sort of impact, such as falling rather than being hit by a car.

so, i did not intend on schrader not fitting. guess i forgot the presta valves were much thinner. i plan to alter the bike these are for to make them schrader only. why? b/c those of us old enough to know realize that presta loses air, flats more, and in general is a really inconvenient way to equip tires of bikes. the rest of the world has inflation that goes easily into schrader valves and even with the valve adapter, i have ruined many heads of inflation pumps trying to fiddle with them into fitting and sealing properly. it's a huge PITA. so, back to this tube....it is thick and feels substantial. had it been flimsy or whimpy, i most likely would have sent it back on not even considered converting to schrader holes on this 700 hybrid bike rim (for the cost of a drill bit and metal file or $12).

I bought this tube as a front replacement on my Rock Hopper 29er - the tube went in with no issues other than the valve stem is nothing like the one in the picture. The one in the picture, and OEM on my bike, was metal and threaded all the way down, and included a nut to hold the stem steady when you threaded the nut flush with the rim. This tube had a rubber stem and was a lot shorter, and slightly fatter than the OEM. After a little finessing it went in and sat tight - I guess Kenda thinks that a fatter stem will also keep in place rather than needing a threaded one. Not ideal, but I am willing to give it a shot. I got it filled and it has held air great so far - solid tube other than slight differences.

After purchasing a cute little used minnie mouse bike for my daughter online, we realized the tire went flat after a few days. I purchased two of these with the click of a button, and they arrived a day later! Installing them was a snap, and we've had no problems since. I highly recommend these little bike tubes.

Product arrived in timely fashion. Item fit my 700 x 28 tires. However, item picture was NOT what arrived. The tube pictured has threads all the way down to base of stem and has a nut to screw down to the rim. My item had neither of these two aspects so not sure if that will affect the long term reliability of this product since pressure for tire is 70 to 80 PSI.

These were difficult to install and surprisingly short on the value. Putting air is a challenge cause hardly any of the top is exposed. Still, they fit and my bike right is smooth!!

I use lots of tube never bought expensive tube these work fine just be careful installing the tube if you pitch it it is shot that's were all bad reviews come from installing tube put little air till tube forms put inside tire that is half on rim with YOUR FINGERS squeeze tire on make sure tube is not on outside of bead both sides put 10lbs in tire go around whole tire work it back and forth then go up to 15 lbs bellow max pressure do same squeeze tire back and forth all around fill to your proper pressure then your good as gold it is only luck you don't get flats that is normal good luck and safe biking recommend these tubes

Reasonable price and good heavy tube. Very happy...cant wait to get a flat tire so I can use it!

Original box of the item was very old and torn upon arrival. Also, for some reason I was expecting two tubes for the price as the original box looks like it holds two. I haven't seen if they hold air yet but so far so good.

Pricey but better than other tubes

One of my pair of tubes leaked down in 48hrs parked. Take a valve tool remove the valve from the stem and put a small drop of olive oil of any other light oil on the black seal at the bottom of valve & reinstall it back into the stem. After doing this I pumped it back to 60 and checked it over the next 2 days, it didn't lose more than a couple of psi mainly due to my testing it every 12 hours. It now holds air.

La ultima vez que hago una compra con un solo clic, ademas de los gastos de envio que no preveia, fatal...en la descripción debería reflejar que es de valvula gorda... no sabia que Schrader significaba valvula gorda, y yo la necesitaba fina. A la hora de intentar devolverlo, me costaba mas el envio que lo que me iban a abonar....o sea que nada a intentar venderla por mi cuenta, para intentar recuperar parte de una mala compra...y eso, sobre todo repasar los detalles, y comprar utilizando la vista previa de la compra, para no llevaros sorpresas con los gastos de envio.