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  1. #1
    Shut Up and Ride domestique's Avatar
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    Will 700x18/20C tubes work a 700x23C tire?

    Sorry if this has already been gone over. I did a quick search and found nothing.

    I got a real good deal on some Kenda Superlite tubes in 700x18-20C size but I run 77x23C Vittoria Corsa evo CX tires and was wondering if it is safe to use these tires?

    I'm guessing 3mm isn't going to make a difference but figured I better ask someone that may know more then me..... The last thing I want is a front tire flat while going downhill at 45+ mph.

    Thanks in advance for answeing my stupid question
    Last edited by domestique; 10-01-06 at 07:29 PM.
    do·mes·tique (dms-tk) n.
    A member of a competitive bicycle-racing team whose role is to assist the team leader, as by setting the pace.

    C'Dale Six13 (Record 08), Olmo Antares (Record/Chorus 06)

  2. #2
    Senior Member thomson's Avatar
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    They are fine, in fact, a lot of people prefer them as they are easier to install. The downside (albeit slight) is the rubber will be slightly thinner as it stretches to fill the 23 tire.

  3. #3
    Shut Up and Ride domestique's Avatar
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    Thanks for the quick reply. I didn't think I would have a problem but figured it wouldn't hurt to ask.
    do·mes·tique (dms-tk) n.
    A member of a competitive bicycle-racing team whose role is to assist the team leader, as by setting the pace.

    C'Dale Six13 (Record 08), Olmo Antares (Record/Chorus 06)

  4. #4
    Senior Member DieselDan's Avatar
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    Not only will those tubes work, but those are what you should use. The inner width of the tire is smaller then the outer width.
    Bikes use brakes to stop.

    If your bike has breaks, don't ride it.

  5. #5
    Blue Light Special kmart's Avatar
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    Lol I had the same question but was too afraid to ask. Thanks

  6. #6
    Senior Member
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    I believe the size on the tube corresponds to the size of tire they are meant for. But I also agree that they should work fine in your 23's. I prefer ultralites myself.

    Al

  7. #7
    30 YR Wrench BikeWise1's Avatar
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    Quote Originally Posted by DieselDan
    Not only will those tubes work, but those are what you should use. The inner width of the tire is smaller then the outer width.
    Huh?....Tube sizes are based on the tire size. 700x18/20 tube is designed to fit tires sized 700x18/20! It's not somehow based on the interior size.

    That said, it should work just fine. The only problem is if you have a tube with a stiffer cross section at the valve, it may not be able to expand much further and may rip.

  8. #8
    ot.net slave
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    using smaller tubes is a very cheap alternative to using ultralight tubes and the result is the same.

    - Joel

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