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  1. #1
    gg physics
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    Schwalbe one 25 blowing off Stans Alpha 340 wheel

    I scared the crap out of myself this morning.

    Last night I pulled a Hutchinson Intensive off my Stans rear wheel and mounted a new Schwalbe One 25c tubeless tire. Poured in some Stans sealant, inflated to 70 psi and left it over night. Bead looked fine when I inspected it so I though I was good to go. This morning I topped up the tires to 95 psi (200+ lb rider) and headed down to my friends house. After a few minutes of chatting, I picked up the bike to head out and noticed something rubbing on the wheel. Upon closer inspection, I could see that the bead was bulging over the rim. I deflated the tire, worked the bead all around and reinflated with a hand pump. 85 psi and pow! blown bead and a spray of sealant all over me. In desperation, I remounted the Hutchinson, with a tube, and had a decent ride.

    What am I missing with the Schwalbe One? The bead looks fine.
    Are 25c tires too wide for the 17mm rim bed?
    Max inflation is 110 psi so I'm within spec.

    I'm pretty competent at building and maintaining bikes.

    thanks for reading.

  2. #2
    RoadBikeReview Member
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    You're going to have sealant all over your face when I tell you this.

    The tubeless version of the Schwalbe One was discontinued and you accidentally bought a non-tubeless tire.

  3. #3
    gg physics
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    The tire absolutely is labeled, in large letters, TUBELESS.

  4. #4
    RoadBikeReview Member
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    Ggphysics,

    I went through some similar experiences with road tubeless last year.

    I ended up going back to tubes.

    I still run tubeless on my gravel bikes (anything below around 60psi), and have had no troubles at all, but my experience trying to run tubeless at road tire pressure was not good.

    Sent from my Pixel using Tapatalk

  5. #5
    RoadBikeReview Member
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    Quote Originally Posted by Migen21 View Post
    Ggphysics,

    I went through some similar experiences with road tubeless last year.

    I ended up going back to tubes.

    I still run tubeless on my gravel bikes (anything below around 60psi), and have had no troubles at all, but my experience trying to run tubeless at road tire pressure was not good.
    I ran Schwalbe Pro Ones on 3 different brand rims at a variety of pressures, including 115psi for PR attempts. Never had an issue.

    As I can't find stock of tubeless Ones anywhere, I'm wondering how ggphysics got his hands on them recently.

  6. #6
    RoadBikeReview Member
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    Quote Originally Posted by ceugene View Post
    I ran Schwalbe Pro Ones on 3 different brand rims at a variety of pressures, including 115psi for PR attempts. Never had an issue.

    As I can't find stock of tubeless Ones anywhere, I'm wondering how ggphysics got his hands on them recently.
    Considering I bought a pair about a month ago ... it's not that hard. With that said, I've had no problems with them at 120+ psi making sure the beads seat properly (though I generally ride around 90 psi).
    Bikes:
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  7. #7
    Russian Troll Farmer
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    Post some pics??
    "L'enfer, c'est les autres"

  8. #8
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    Quote Originally Posted by Wookiebiker View Post
    Considering I bought a pair about a month ago ... it's not that hard. With that said, I've had no problems with them at 120+ psi making sure the beads seat properly (though I generally ride around 90 psi).
    Ones or Pro Ones? I cannot find tubeless Ones online at all, just the folding/V-Guard tubetype.

  9. #9
    gg physics
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    So i can add some details for everyone. I purchased the Ones (a 25 & a 28) more than a year ago. Bought them at a good price and just now need them. I called Schwalbe today and spoke with a rep. He explained that they have had some experience with One tubeless blowing off Stand rims in particular. He went on to describe how Stans rims have a rim depth dimension that doesn't work well with Schwalbe tubeless. I'll send the serial number to their warranty department and hope for some credit. Do i dare mount this tire on a clincher rim with a tube? The other unmounted tire is a 28; I'll save it for another wheel.

  10. #10
    changingleaf
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    That looks like a defective tire.

  11. #11
    'brifter' is a lame word.
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    Quote Originally Posted by ceugene View Post
    You're going to have sealant all over your face when I tell you this.

    The tubeless version of the Schwalbe One was discontinued and you accidentally bought a non-tubeless tire.
    Amazing how you can be so certain about this and you've never seen the tires in question.
    I work for some bike racers
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  12. #12
    RoadBikeReview Member
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    Maybe the problem is more the Stand Alpha 340 than the Tyres. Many years ago when the Alpha 340 was first released I had an issue with normal tyres and tubes blowing off the 340 rim. When I first posted here on this forum most told me I was doing something wrong with mounting the tube. One particularly voracious (and frequent poster who was in the wheel industry) confirmed to me that I was doing something wrong. A few months later he was on the thread asking if other had had this same problem.

    Do a search about stand alpha 340 blow off. It happens with tubes and tyres not only tubeless, so if the rim has not been changed from stans then it doesn't surprise me that this is still an issue.

  13. #13
    RoadBikeReview Member
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    Ok did a search myself and found it:

    Tire blowing off Stans Alpha 340 rim

    With my post and some useless advice re mounting tubes, tyres etc.....

    A lot of (typical for this forum.....) blaming and unhelpful remarks but I think it will show the route of the problem.

    Do a search for "tyre blow off" and see how many other rims come up in your search. As from my post in the above link I stopped using mine and was very lucky not to fall off. I felt they were so bad I didn't even try and sell them on.

    Saying that I have a mate who has the Alpha 400 and we have ridden the Ronde van Vlaanderen 250km tourist event together twice without issue.


    Happy ridding but a tyre blowing off a rim mid ride is only going to have a bad result...

  14. #14
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    I had a Schwalbe Nobby Nic blow off a Stan's Arch MTB rim when I inflated the tire to 50 psi to seat on the rim. I later realized that the Arch rim had a max tire pressure of 40 psi. I lost a bit of hearing in my left ear it was so loud! Sealant blown all over the room. switched to Maxxis tires and no more than 40 psi on my Stan's wheels, no blow off problems since.
    Last edited by RB Rob; 10-09-2017 at 07:02 AM.

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