Originally Posted by Excelsius (Post 12285567)

Resident skeptic, my definition of an impact puncture is just that - a tube getting punctured due to an impact. That's not the same as pinch flat. It also does not fit the profile from what you said (two holes). Furthermore, that hole was on the outside of the tube. And if you read what I said, I am not comparing the regular tube to the ultralight one.

The tire and the rim were tested before each tube was installed. Additionally, I had total of 4 flats. This is just one of them and the most bizarre one. Again, the thorn in the tire did not cause a failure in this case.

Even though the profile of the last flat does not fit the snake bite pattern you mentioned, you could be right that I somehow damaged the tube. I see no marks of pinching and I have seen that before when I made a mistake on the stock tubes. And if a tube is going to be damaged by the slightest movement, maybe it's not worth it, at least until I get perfect at this, if its possible to be any more careful. You could make suggestions as to how I could improve my technique. My levers never touch the tube and the tube is fully inside the rim and slightly inflated when I install the last bid of the tire. As to "properly checking" that the tube isn't pinched, exactly how am I supposed to do that?

Forte ultralight is $5.29. Regular is $3.99. These are sale prices. I got the Bontrager for $2.49 from a local JensonUSA. Do the math.