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Old 08-08-11, 08:16 PM   #1
Denny004
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Inner tube sizes

I asked for an inner tube for a 700x35c tire. The sales person gave me an inner tube for a 700 x 28c-32c tire (Bontrager 48mm stem presta valve)--will this fit on my tire?
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Old 08-08-11, 08:24 PM   #2
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probably, inner tubes stretch a lot. your tire is just the next size up, I would use it in a 35mm tire.
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Old 08-08-11, 08:32 PM   #3
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It will be fine in your tire.
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Old 08-09-11, 06:01 AM   #4
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I used to obsess about those inner-tube size ranges. But I've learned that "close enough" is "good enough". Your tire is 3cm wider than the tube's nominal range. I would not give that small difference a second thought.
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Old 08-09-11, 07:26 AM   #5
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My concern would be the valve.

While a presta valve will fit through a hole for a Schrader valve do you really want to do that?

I'm making a big assumption here that this is for a hybrid style bike and the tube you are replacing has Schrader valves.

Schrader:



Presta:

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Old 08-09-11, 08:55 AM   #6
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Quote:
Originally Posted by ahsposo View Post
While a presta valve will fit through a hole for a Schrader valve do you really want to do that?
There's enough reinforcement around the stems that I"ve never had a problem from sticking a presta tube into a Schrader rim. OTOH, I do not run really high pressures in my tires, so maybe I've just gotten away w/it for that reason.
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Old 08-09-11, 09:15 AM   #7
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Well I know that. But if the OP isn't used to dealing with Prestas why bother. I read an awful lot a posts where even experienced riders break the valve stem on Prestas. I've done it.

The nature of the OPs question leads me to assume (it's an assumption and I could be wrong, this would not be unusual - ask my wife) that they are relatively inexperienced with bikes. Shrader valves are easier to deal with. But that's their only advantage, IMO.
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Old 08-09-11, 09:19 AM   #8
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@ahsposo, good point. People are often flummoxed when first confronted by presta valves.

You know what else gets people? Name-brand bicycle floor pumps all seem to work backwards from what everyone has grown up used to. The first time I bought a floor pump, I was shocked to find that one lifts the lever to lock the pump onto the valve, and pushes down to release. For 40+ years I had only ever used pump heads on which you push down to lock and pull up to release. Every friend and neighbor who borrows my floor pump is at first confounded by that reversal. Inevitably, they pull up on the lever to release -- or so they thing -- and frustrate themselves in trying to jam the pump head onto their valve.
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