Ultra heavy duty tubes on the street

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by FakeName, Jan 8, 2013.

  1. FakeName

    FakeName Wile E Coyote SuperGenius

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    Thanks for your post.

    On what basis do you know they've saved you from flats? I have no reason to doubt, but am seeking some data.

    Thanks again.
    #21
  2. Newbusa

    Newbusa Been here awhile

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    Me too, And have never has a flat with that combo as well.:D
    #22
  3. DrKayak

    DrKayak Retro Rider

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    I run UHD on both my 450 and 950 for the last 5 years. I have never got a flat on either bike. EVER.

    Never noticed the tires getting hot on either bike.
    #23
  4. Rodknee

    Rodknee the post is mightier than the sword...

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    my synopsis of this thread: first half of posts, UHD tried kill me! second half of posts, UHD are awesome!

    :huh
    #24
  5. mtncrawler

    mtncrawler Long timer

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    .:lol3:lol3

    It was just getting interesting. :D

    So UHD's on a 650 dual sport would be out of the question/not really necessary/overkill? So far good and bad things have been noted by users on bigger DS's like the 990/950, riding pavement at higher speeds with UHD's. I'm wondering if the bike weight dictates or could influence the decision then? Not to hijack a dead thread (is that possible..hmmm.), but say I was wanting to run (OK, let's say I will be running) the Western TAT, lot's of pavement on the way home. Use UHD's, lower pressure for the trip out, jack up the pressure for the ride home, crank it up on pavement (75/80ish MPH...thats cranking for 650 DS at least for me) and forget about it?

    I've heard the Michelin UHD's in particular weight in like a tire..I'll be running Michelin Desert Race tires to protect those heavy tubes.

    What say ye..any other suggestions...like go start another "which oil" thread somewhere?..:D
    #25
  6. pdxmotorhead

    pdxmotorhead Long timer

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    OK,, now everybody who said they had no problems or a flat,, NEEDs to post now that they have taunted the tire gods the next time they have a flat on a trip,, or how many! :rofl

    Dave.
    #26
  7. MortimerSickle

    MortimerSickle Semi-Adventurer

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    I replaced my rear tube with WD-40, er, I mean, silicone. :D
    #27
  8. dzrtracin

    dzrtracin ride'n 2 live

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    Iv'e run HD tubes since i first got my 950 ADV in 05' & again in my SE since 06' Have NEVER had an issue, or a flat (DOH) in 8 years. Like anything now days, NEVER use this for that BECAUSE etc, etc, etc.

    RIDE ON!
    #28
  9. knobbyjoe

    knobbyjoe Adventure and dirt rider

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    Once again we need a good scientific test... Let's see different: tubes, tires, air pressure, load, speed, temperature, rubber types, talc powder, corn starch, grease, etc. Sounds like a university engineering proposal. Now just need a sponsor.
    #29
  10. MortimerSickle

    MortimerSickle Semi-Adventurer

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    http://www.grants.gov/
    #30
  11. knobbyjoe

    knobbyjoe Adventure and dirt rider

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    touché Mortimersickle...One more thing, need a qualified educational type to write the grant proposal for their engineering school.
    #31
  12. mtncrawler

    mtncrawler Long timer

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    NOW we're getting somewhere...:lol3

    I think I'll load the tires with UHD's, WD-40, and SLIME and call it good..:D
    #32
  13. triplenickel

    triplenickel Long timer

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    Don't let the drama lamas scare you, I have 70k on this bike alone with UHD's and never a problem like 99% of the others that use them.

    With everything else being equal how does a UHD tube generate more heat than a thinny?
    #33
  14. crashmaster

    crashmaster ow, my balls!

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    I will also add that I used one particular UHD tube with 2 hot patches on it for over 20,000 miles. No issue. I'm not saying you cant have a high speed blowout on pavement, but my best guess is that low pressure was a more likely culprit than the thick tube.
    #34
  15. syzygy9

    syzygy9 Been here awhile

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    So the question is why are you running UHD inner tubes? they don't help against conventional punctures and may help resist pinch flats. So the only time to use them would be low'ish speed xcountry running at low tyre pressures, yet lots of people seem to use them for street use where presumably they are being run at high speed and high pressure.

    The main disadvantages are that they get much hotter than conventional tubes (unless pumped up hard so no tyre flex) which may cause them to blow out, weigh more (more unsprung weight) and more unwieldy to work with.
    #35
  16. FakeName

    FakeName Wile E Coyote SuperGenius

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    The advantage of a international forum is in the numbers- they stack up interestingly against theory. Leveraging experiences help us gather data with which to make our own decisions.

    Foe me, of course if I were riding only on the street, I'd not worry about flats.

    But I ride both, with a strong preference for remote off-road, but often ride the highway to get there. Some of that road work includes stretches of freeway that crosses hot deserts.

    One needs only one hot-weather tire change without shade to promise oneself to take all possible measure, however small, to avoid a repeat event.

    I run the UHDs.
    #36
  17. triplenickel

    triplenickel Long timer

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    Why? Proof or internet myth? Granted I don't live in a hot climate but I've yet to feel a diff in tire carcass temp with UHD's compared to thinnys. I assume that's where people are feeling this "extra heat" or are they doing some type of internal temp measurement?
    #37
  18. mtncrawler

    mtncrawler Long timer

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    Not sure you meant this for me (or the OP)...but I am not running UHD's - just trying to figure out if its the right way to go.

    This describes most closely what my riding goals are for the "X" and the next couple years and I tend to think in the same terms as far as pros/cons. It seem like trouble arises with UHD's running higher speeds and low pressures on pavement, whereas if you increase the pressure for the road/higher speeds, it keeps temps down that are created via the tube slipping at lower pressures? Did I just answer my own question then?

    I would interested in seeing data as well...maybe not a thesis as suggested above..:lol3 (I deal somewhat regularly with statistics, so I have a good idea of what it takes to reach significant, statistically sound conclusions from data). It ain't gonna happen on a forum without some very careful and consistent data collection (probably a stretch at that)..:lol3
    #38
  19. Two Moto Kiwis

    Two Moto Kiwis Homeless Somewhere

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    We run them front and rear in Maya in CA heat with no issues, we are also loaded two up with house and contents.

    Just changed the MT21 front tire at Moto Mundo in Antigua with 10646 km on it and the tube looked like new.

    Let you know what the rear looks like in Bogota when we change the rear with a K60 Heidi on.
    #39
  20. MortimerSickle

    MortimerSickle Semi-Adventurer

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