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Old 09-22-10, 12:13 PM   #1
moman
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Please read... Inner tube size

Well I have a 26x1.95 inner tube with a presta valve. Due to a bit to much agression while pumping the tyre caused the presta valve to crack off. I knew instantly that a new inner tube was needed so I had a look around and found a inner tube with a car valve sized 26vx2.0. I want to fit this one but there are two problems

1. the hole is too small- solution: I have been told to carefully drill through to increase the size so that should be sorted...

2. Obviously the new inner tube is 26 by 2.0 and the actual tyre has 26X1.95 written on it. Should I still use it or could it damage my bike?

Thanks-any replies welcome
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Old 09-22-10, 12:18 PM   #2
AlmostGreenGuy
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The 26X2.0 tube will be fine. I've used them for tires as thin as 26X1.5.
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Old 09-22-10, 12:26 PM   #3
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The 26X2.0 tube will be fine. I've used them for tires as thin as 26X1.5.
Thanks for replying, am going to go try it now...
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Old 09-22-10, 12:39 PM   #4
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Rather than weakening the structure of the rim, just buy a new tube that has the appropriate valve size. Also get a better pump that has a hose on it so you don't tear off the stem while inflating the tube.
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Old 09-22-10, 01:05 PM   #5
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DONT TRY IT!. Dont weaken the rim, as D-S said. You bought a schrader valve, just go exchange it for a presta valve. Your local bike shop should have them. If not (Dont bite my head of guys) but Walmart has started carrying presta.
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Old 09-22-10, 01:36 PM   #6
slowandsteady
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Quote:
Originally Posted by deep_sky View Post
Rather than weakening the structure of the rim, just buy a new tube that has the appropriate valve size. Also get a better pump that has a hose on it so you don't tear off the stem while inflating the tube.
+1
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Old 09-23-10, 08:27 PM   #7
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Rather than weakening the structure of the rim, just buy a new tube that has the appropriate valve size. Also get a better pump that has a hose on it so you don't tear off the stem while inflating the tube.
Yeah. It'll probably be OK if you drill it--I've done it--but why take the chance or go to the trouble? Presta is easier to inflate (you don't have to fight the spring that holds a shrader valve closed) and theoretically less complicated, though that probably doesn't matter in actual use. If your pump will fit only a shrader (car-type) valve, any bike shop will sell you an adapter for about a dollar so you can use it with a presta. Then when your pupump wears out, or you buy a new one, get one with a presta chuck.
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Old 09-24-10, 08:57 AM   #8
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Originally Posted by deep_sky View Post
Rather than weakening the structure of the rim, just buy a new tube that has the appropriate valve size. Also get a better pump that has a hose on it so you don't tear off the stem while inflating the tube.
I wouldn't worry one tiny little bit about widening the valve hole in a rim that's designed for 2" wide tires. I've seen lots of rims that failed from tension at the spoke holes, but I've never ever seen one, even on skinny little road rims, that failed at the valve hole.

If you have an air compressor that you typically use to inflate your tires, Schraders valves are definitely the way to go.
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