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  1. #1
    Senior Member Sundance89's Avatar
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    Tubes a size too small . . . No harm No foul?

    I recently got a new wheelset and needed some long stem tubes. It was late and my LBS was closed and I wanted to ride in the morning so I went to REI. I'm running Ultra Gatorskins (28's). Rei was out of tube sizes 700 x 26-32, so I got 700 x 20-25.

    Even though it has worked so far, what's the downside of this? Am I at slightly more risk for a blow out since the tube is stretched thinner? I'm also in some extreme temps in Arizona, so road surface temps can be off the charts.

    All I can think about are those poor SUV's flipping over from blowouts with Firestone tires some years ago. (Although after reading the reviews about Novara tubes, maybe I should just be worried about poor quality.)

  2. #2
    What??? Only 2 wheels? jimmuller's Avatar
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    Quote Originally Posted by Sundance89 View Post
    I'm running Ultra Gatorskins (28's). Rei was out of tube sizes 700 x 26-32, so I got 700 x 20-25.

    Even though it has worked so far, what's the downside of this? Am I at slightly more risk for a blow out since the tube is stretched thinner?
    No.
    Real cyclists use toe clips.
    jimmuller

  3. #3
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    i was taught to ALWAYS go with the smaller tube size so that is all i've ever used. in fact i've got the same size tube in a 700x35 tire right now. no issues

  4. #4
    Senior Member mvnsnd's Avatar
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    Not a problem. Remember the tube is captured by the tire, so it can only stretch so far.

  5. #5
    aka Phil Jungels Wanderer's Avatar
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    No Problem!

    "Retirement is the best job I ever had!" Me, 2009


    Specialized Crosstrail Sport - '08
    Nishiki Sport - misappropriated from my youngest son (circa 1984)
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  6. #6
    Senior Member Sundance89's Avatar
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    Appreciate it. It's the little things sometimes.

  7. #7
    Spinning @ 33 RPM Glynis27's Avatar
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    I once paid $0.20 extra for a 26x2.25-2.4 tube over the 26x1.95-2.1 tube. When I looked at it, it actually had 26x1.95-2.1 molded into it with 26x2.25-2.4 stamped over that. I guess the manufacturer doesn't think it matters either.

    Running a smaller tube is fine. The spare tubes I carry are the smaller size and I frequently just leave them in there. I've never had a flat due to too small a tube.
    1989 Fuji Saratoga
    1997 Schwinn Mesa SS
    2007 Felt F1X
    2008 Transition Vagrant SOLD!
    2010 Transition TransAM
    2011 Soma Analog SS

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