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Old 05-06-11, 03:14 PM   #1
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Tubes, how come some have a short expansion and others have a larger range?

Just curious because I'm looking at

Avenir 700 Threaded Presta tubes. On Amazon they have some that are 23-25, while at REI they have the same tube but from 20-25. I also see some from 25-35. As I have 25mm tires I wanted to know if there is a reason for some tubes having a smaller range vs larger.
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Old 05-06-11, 04:06 PM   #2
These go to 11.
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Different size tires require different size tubes & the range of sizes varies from manufacturer to manufacturer. As long as the tube is within the range that your specific tire needs you will be fine. I say to go with the smaller range within your size requirements to save some weight, i.e., a 20-25 tube -vs- a 25-30 tube if you run 25mm tires.
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Old 05-07-11, 02:06 AM   #3
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Tell you what's even odder than the tube specs. I bought two spiral flourescent bulbs. They were both the same brand, but one promised to save $129 and the other $130 over 8 years.

PS: They won't last anywhere near 8 years.
Some people are like a Slinky ... not really good for anything, but you still can't help but smile when you shove them down the stairs.
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