Tubolito Tubo 700c CX/Gravel Inner Tube (Presta) (30 - 47mm) (42mm)

HUGE disappointment. Had difficulty mounting the tube to the tire and rim. It looked like the tube was too small for the both (I had a 700 rim and tire). Eventually, I got the tube mounted and I made sure the tire was solidly mounted on the rim. Then I pumped it up. It felt like I gave more pumps than I usually do, and when I looked on the other side of the tire, the tube had pushed the tire off the rim. One second later. BOOM! The box says the tube fits 650B and 700. Well, a 650B is smaller than a 700. It would be like a 6-foot tall man trying to wear the pants of a 5'9" man. It might work. But it doesn't in this case. If it was a $5 tube, I'd eat it, but this product is not sized correctly, and I believe I should get a refund of $34.95. I'll happy to return the tube and the box.