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10-17-03, 06:55 PM
I finally convinced my wife that she needed to learn how to fix a flat. So, she picked up a thorn on one of her rides (the thorn stayed in so the leak was very slow and we didn't notice it until we were home).
Anyway, she goes about changing the tube under my watchful eye. We even use a brand new tube. Everything goes just fine and we set the bike back on its stand. Then, about 10 minutes later --- bam. We look around and find the cause of the loud bang was that the freshly changed tire is now flat.
I pulled the tube, and attached the image of what I found. (Hope this works)
The split in the tube is about 6" (15 cm) long. It is on the valve side of the tube and goes along the seam except where it goes around the valve stem.
The tube was pumped up to the recomended tire pressure. There were no thorns or anything on the inside of the wheel. I can't imagine the tube was pinched by the stem.
Could the tube have been defective? Has anyone else had a defective tube? How common are defective tubes?
The wheel is a 700x23. On the tube, it says it is a 700x19/23C. However, on the box it says 700x18/20C. LBS said tube would be fine. Is the tube too small?
Anyway, she goes about changing the tube under my watchful eye. We even use a brand new tube. Everything goes just fine and we set the bike back on its stand. Then, about 10 minutes later --- bam. We look around and find the cause of the loud bang was that the freshly changed tire is now flat.
I pulled the tube, and attached the image of what I found. (Hope this works)
The split in the tube is about 6" (15 cm) long. It is on the valve side of the tube and goes along the seam except where it goes around the valve stem.
The tube was pumped up to the recomended tire pressure. There were no thorns or anything on the inside of the wheel. I can't imagine the tube was pinched by the stem.
Could the tube have been defective? Has anyone else had a defective tube? How common are defective tubes?
The wheel is a 700x23. On the tube, it says it is a 700x19/23C. However, on the box it says 700x18/20C. LBS said tube would be fine. Is the tube too small?