Stupid question about inner tubes

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2005-06-22 4:47 PM

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Veteran
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Cleveland, OH
Subject: Stupid question about inner tubes
Okay so I'm a cycling noob. Sorry for that. I have what feels like a dumb question but I have to ask anyway.

I sent my wife to the LBS to pick up some tubes. I sent the box from the last one w/ her so she would be sure to get the correct size. Well some dood was helping her and said "Oh here, use these." and handed her a couple boxes. "Cool" I said. I definately have the correct size. Well now I'm looking at the boxes and I found that the old size is 700x20/28c however the new is 700x18/25c.

Am I missing something? I'm inclined to say that these new ones will not work. But then again, I'm a noob. So tell me people, what am I missing?

HD

2005-06-22 4:51 PM
in reply to: #181234

Master
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Shreveport, LA
Subject: RE: Stupid question about inner tubes
These should work just fine.

20/28 means it will fit 20-28 tires and the 18/25 means it will fit 18-25 tires. Most road tires are 20 or 23 so unless you have really wide tires then you should be just fine.
2005-06-22 4:53 PM
in reply to: #181234

Master
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portland, or
Subject: RE: Stupid question about inner tubes
The first number (700) represents the tire diameter. The second set (20/28c and 18/25c) represents the range of tire thicknesses the tube will fit in. You're likely riding a 23, maybe a 25. In which case either of these will work. You should be able to find the spec on the sidewall of the tire.

scott
2005-06-22 5:02 PM
in reply to: #181234

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Cleveland, OH
Subject: RE: Stupid question about inner tubes
Cool. Thanks .

HD
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