Co-op Cycles  Presta Tube - 700 x 23 - 25 / 28 - 32 / 35 - 43

Bought 2 23-25 and 2 35-43. 1 of the 35-43 tubes busted near the value after 1 day riding. Took it back to the store in Fairfax and was told they don't replace tubes. Understandable but wish they made that clear when I bought them so I didn't have to waste a trip. Very disappointing product and service, a rarity based on my experience. TLDR, I won't be buying tubes from REI again.

seam split on a new tube before i could even ride on it, inside a new road tire at 90 psi

I purchased two of these—one to replace on my bike, the other just as backup. The first had a visible weak surface defect around the valve and began to bubble at that point around 10psi. I gradually inflated the second and discovered the next day there were at least 3 pinholes around the valve. Just save your time and spend a little more on a better quality tube. I usually love co-op brand products, but these—confirmed by many other reviews—are frequently defective and poor quality.

I bought this tube as backup for road emergencies a while back. Had my first flat tire in two years. No problem, I'm prepared for this! Changed the tire only to find out that the replacement tube had a big tear about 0.5cm right out of the box and could not be inflated!! The punctured tube did even hold air better than the new one! Absolutely disappointing!!!

I installed the tube. When I tried to fill it, it leaked. Turns out it had developed a tear near the valve. It is made by Kenda, which doesn't have a good reputation either for bike or car tires, and in my experience doesn't make quality products. Perhaps I wasn't gentle enough when installing, though I tried to be careful. I am inclined towards thinking that quality control is poor, and the tube is weak exactly where it's subject to tension.

Very poor 2 problems in the 700c X 28-32c size; 1) tube circumference (length?) is an inch or more too long to fit in the tire (bontrager aw1 700x28c): it bunches and wrinkles. Likely to cause a flat. I am going to use it anyway cause i need to get back on the road. 2) valve design is too clever. Stem is smooth near the valve end. Probably thinking it will make a better seal. Seems like a good idea until you try it. It reduces the diameter so i had to adjust my pump to fit. That would be fine, but now the pump doesnt fit the other 9 tires in the house.

I had a gift card and bought 4 of these tubes. All 4 went flat within 3 weeks. They all split on the seam couldn’t believe it. I usually ride bontrager tubes and will never use anything else now. I’ve gone over 2 years on a single bontrager tube. However, I’m like a nascar pit crew changing tubes on the side of the road now, thanks REI for that at least!

Installed an REI brand tube (manufactured by Kenda). Immediately started leaking at area where rubber seals around valve stem. Installed another and immediately ruptured along seam. Apparently terribly poor manufacturing quality standards. Save your time and money and buy a better brand.

I installed the tube and it looked fine. The next day the tire was soft. I removed the tube and inflated it. There is a section of the tube about 1/2" wide that seems to be thicker than the rest and it doesn't stretch as much as the rest of the tube when inflating. In that section of thicker tube there were numerous tiny pits in the rubber and that's where air was leaking out. The tube has "Kenda 700x28/32c, low lead" printed on it.

Put them on!! They hold air!! Good to go!!!