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  1. #1
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    Correct tubeless tape width

    Hello everybody.

    I need to order a tubeless tape for my rims from the internet, and I need your advice about its width.

    My rims (both are 29er):
    1. EASTON Arc 27. External rim width is about 31mm
    2. WTB Asym I29. External rim width is about 34mm

    I read that someone recommended to buy a tape with the same width of the inner rim width, but this page says that "WTB recommends using tape that is 5mm wider than your inner rim width." - so I'm little confused... Which tape width is the correct one?

    BTW, if you have a non-expensive recommended tape - I'll glad to know.


    Thanks a lot!

  2. #2
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    I usually follow WTB's recommendations, but you'd be okay either way. A wider tape will cover the interior of the rim and a bit of the (interior) sidewall.

    I've used narrower tape in the past without issue, including 25mm on a 35mm interior rim, and currently have 27mm on a 30mm rim.

  3. #3
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    The tape just has to cover the spoke holes. The tire doesn't have to sit on it, though full-width tape is less likely to dislodge when you change tires and gives a tighter fit that may prevent some tires from burping. With carbon 29i and 39i rims designed for tubeless, I haven't had a problem with a double-layer of 20mm Kapton tape. Tyvek sheathing tape also has admirers.

    Tubeless Tape Thread

  4. #4
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    I need the tape to be as closest to the sidewall but won't cover it.
    I appreciate your help, but what's the bottom line? What tape width I need for each rim?

  5. #5
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    Quote Originally Posted by AmitH View Post
    I need the tape to be as closest to the sidewall but won't cover it.
    I appreciate your help, but what's the bottom line? What tape width I need for each rim?
    There's not a right answer. I have multiple widths on hand.

    Some rims don't work with wider tape because there shape of the center channel. It's better to use the narrow 1/4".
    Some work better with tape covering the whole rim bed.

    I would say start with something narrow that just is wide enough to cover spoke holes.

    Sent from my Moto G (5) Plus using Tapatalk

  6. #6
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    Go for something thats wider than your rim. You stretch the tape so it adheres better to the rim, and when you do the tape gets narrower. Not all rim and tire combos need the tape to seal between the bead and the rim, but some do. You would do fine with a tape thats maybe 3-5mm wider than the rim. If the tape is really stretchy you can probably get a wider tape still. A cheap alternative is electrical tape.

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