Stan's blowout!!!- Mtbr.com
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  1. #1
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    Stan's blowout!!!

    So I did my first ride on Stan's tonight and had a major blowout! Here are the specs: DT 4.1 rim, Hutchinson Python airlight all new. I get stan's set up Sat. no problem, seals quick, then I add the sealant and re-install the tire. Inflates no problem. Doesn't loose any air at all. I pump the tire to about 40 psi and go ride. Rooty, rocky slick NE singletrack. About 15 mins in, I am actually walking a rocky uphill and the tire blow off the front rim. Sealant everywhere! I throw a tube in and continue to ride, the back works perfect the whole ride. What did I do wrong here? Any help appreciated.

    Kurt

  2. #2
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    Quote Originally Posted by trukweaz
    So I did my first ride on Stan's tonight and had a major blowout! Here are the specs: DT 4.1 rim, Hutchinson Python airlight all new. I get stan's set up Sat. no problem, seals quick, then I add the sealant and re-install the tire. Inflates no problem. Doesn't loose any air at all. I pump the tire to about 40 psi and go ride. Rooty, rocky slick NE singletrack. About 15 mins in, I am actually walking a rocky uphill and the tire blow off the front rim. Sealant everywhere! I throw a tube in and continue to ride, the back works perfect the whole ride. What did I do wrong here? Any help appreciated.

    Kurt
    "What did I do wrong here?"
    Only one thing in my book - using DIY tubeless in the first place.
    Some people do very well with it. Others do not. The problems and mess are not worth it to me (and I have tried it).
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  3. #3
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    Quote Originally Posted by trukweaz
    So I did my first ride on Stan's tonight and had a major blowout! Here are the specs: DT 4.1 rim, Hutchinson Python airlight all new. I get stan's set up Sat. no problem, seals quick, then I add the sealant and re-install the tire. Inflates no problem. Doesn't loose any air at all. I pump the tire to about 40 psi and go ride. Rooty, rocky slick NE singletrack. About 15 mins in, I am actually walking a rocky uphill and the tire blow off the front rim. Sealant everywhere! I throw a tube in and continue to ride, the back works perfect the whole ride. What did I do wrong here? Any help appreciated.

    Kurt
    A couple of guesses. Did you make sure the rubber rim strip was tucked under the lip of the rim all the way around? Did you drill out the hole for the stem so the rim strip lays flat? You might have too much air pressure in your tire also. I run my Pythons at 30 to 35 psi. I have had no problems other then a torn sidewall from rocks.

  4. #4
    KgB
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    too much pressure

    I had a Stans explosion in our shop.
    So whenever anyone wants us to do a Stans conversion I will just point to the ceiling.
    I've been inside too long.

  5. #5
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    Sounds like the rim strip may have not been tucked in all the way under the bead. This is very tedious and talcum powder must be used to get the thing slippery enough to lay down.
    Also, as mentioned already, the valve stem hole must be drilled out or the rim strip wont lay down properly at the valve stem.

    Sorry to hear you had problems. I've been using Stan's for almost 2 years and have had no problems except letting the air pressure get a little to low allowing some air to "burp" out of the tire.

    Good Luck
    Calling out from the Land of the Riding Hillbilly.


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  6. #6
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    checked all those things.

    The rim was opened to 3/8 inch. The rim strip was evenly set below the bead lock. Pressure was 38-40 pounds.

    Kurt

  7. #7
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    My 2 cents

    Quote Originally Posted by trukweaz
    The rim was opened to 3/8 inch. The rim strip was evenly set below the bead lock. Pressure was 38-40 pounds.

    Kurt
    I have had great success in running Python Airlights on Bontrager Racelite Tubeless wheels. I am sure that there was no problem with your Pythons...however, some rims have different depths to them. The tolerances/variances have been quite extreme in some cases. For example, there have been known problems with some Bontrager rims working extremely well and than some that do not. I had a friend that had his rear tire blow off the rim during a race. Come to find out that his rim depth was not adequate enough for his Stan's rim strip and tire bead seal. He sent his rim back and got one that is much better. So, what I am trying to say is that your rim may have a defect in that the depth is too small for a perfect seal, but it still was within the manufacturer's variance allowance. Your other rim seems to be working just fine. If you have a moment, measure both rims and compare the 2 to see if there are any differences.

    One more thing try running a little less tire pressure as well. That is the great thing about going tubeless. I run about 30-32 psi and it works great for me.

  8. #8
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    Here's <a href="http://www.yestubes.com/">the solution</a>

    If you want to avoid ending up like this that is:

    <img src="http://www.shitshifter.com/pictures/images/Pb100185.sjpg?width=500" border="0" />
    Don't you guys ever talk about anything apart from bikes?
    www.shitshifter.com

  9. #9
    Needed Less ~ Did More
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    Quote Originally Posted by AndyArmstrong
    Here's <a href="http://www.yestubes.com/">the solution</a>

    If you want to avoid ending up like this that is:

    <img src="http://www.shitshifter.com/pictures/images/Pb100185.sjpg?width=500" border="0" />
    Andy,

    You going to put any of the Photoshopped versions of that up now?

    See you Saturday at the Geordie SS Champs.

    SSP
    "Put any one on one of these singlespeed bikes and they could not help but have fun"
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  10. #10
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    I didn't bother to remember where any of the other versions are but they're out there

    I'm not sure when/if I'll make it on Saturday - there's the small matter of a three year old's birthday to prepare for / attend. Are you around on Saturday night? Sunday?
    Don't you guys ever talk about anything apart from bikes?
    www.shitshifter.com

  11. #11
    Needed Less ~ Did More
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    Quote Originally Posted by AndyArmstrong
    I didn't bother to remember where any of the other versions are but they're out there

    I'm not sure when/if I'll make it on Saturday - there's the small matter of a three year old's birthday to prepare for / attend. Are you around on Saturday night? Sunday?
    I'm there all weekend so I'm sure I'll see you at some point.

    SSP
    "Put any one on one of these singlespeed bikes and they could not help but have fun"
    -
    Otis Guy talking about klunkers c1976

  12. #12
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    I've found that Stan's Rim Strips are perfect...

    ...for use as chainstay protectors. They provide a lighter and more consistent wrap albeit at 10x the cost of a blown tube.

    I gave up after having a "core" launch out into the wilderness leaving me to install a YesTube in the NoTubes sticky, messy wake.

    I know plenty of people that swear by (at?) them, but for me it was the worst $50 I ever spent.

    Sean
    Professional Amateur

  13. #13
    6x7=Dont Panic!
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    Try this alternative to Stans: Yes-Tubes
    They work great for me!
    Herro prease

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