The Bivouac (general rallye raid news)

Discussion in 'Racing' started by PackMule, Dec 23, 2009.

  1. skibum69

    skibum69 slave to gravity

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    I saw a few pics of totally roasted tires from different riders and not all pros. I'm interested to see what comes out of it for selection for the average joe
  2. Hayduke

    Hayduke ///SAFETY THIRD/// Super Moderator

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    I remember seeing that both Jonah and Quinn Cody were using Dunlop 908's. :dunno
  3. skibum69

    skibum69 slave to gravity

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    my next choice for my 640A
  4. JMo (& piglet)

    JMo (& piglet) Gone a bit Baja

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    I used 908RRs on my XR650R,and I really liked them - the last a very long time. They may not be as grippy in wet muddy conditions (like the last couple of days Dakar this year), but in the dry they are very progressive and confidence inspiring...

    I spoke to Niles about using the 908s on Jonah's bike, and he said they worked perfectly well with Michelin BiB Mousses - so at least that's a combo you can trust?

    As for Pilbara's question abut Tubliss - I don't imagine anyone bothered with that system - it's too much a faff to change (quickly), and there is still the potential of getting a flat... you might be able to ride home off the trail with a Tubliss holding the bead to the rim, but on a rally stage I imagine the tyre would be destroyed in a short while - it's not worth the risk. Better not get a flat in the first place and use a mousse.

    Jx
  5. schattat

    schattat Long timer

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    KTM was forced to use Pirelli tires since Stefan Everts decided to use their tires in the MX series (Michelin previously supplied them with the stuff). Michelin got pissed off and told them they should find somebody else to equipd them with tires :eek1
    In 2010 Despres made the "inofficial" move the Michelin as he only had drama with the Pirelli "Deserts".
    This year Michelin is back "officially" and not only supporting KTM, but BMW, Yamaha, Aprilia and Sherco, so pretty much everybody :clap Earlier KTM was able to get hands on special Deserts that were of better and longer lasting compunds whereas everbody else had to live with the off the shelf stuff.

    For 2011 and onwards, Michelin has designed a new Desert Race and Marathon tire, as they call it, to suit the 450 more. Looks like they did an excellent job, as always :thumb

    http://www.michelin.com/corporate/content/newsAndPress/products_and_services/DAKAR_MOTO_2011_EN.pdf
  6. yety61

    yety61 Global Vagabond

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    49 weeks and counting. :D
  7. JMo (& piglet)

    JMo (& piglet) Gone a bit Baja

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    I found a good way of preserving the front tyre - and the perfect excuse for a gratuitous self-promotion shot:

    [​IMG]

    Jx
  8. Pilbara

    Pilbara In the flow...

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  9. roadchick

    roadchick Been here awhile

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    Thanks for the tip on tire preservation:wink: Nice shot!!!

  10. crankshaft

    crankshaft Guns are for pussies

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    Been running Tubliss on my 950 SE for a year now and I find the opposite to be true, I can change them faster than a tube. I have eliminated the possibility of getting pinch flats and when I ran tubes, I would get them on the SE all the time while running hard in rocky terrain. I've also ran them on Rally stages with no problems at speeds up to 116 MPH and I'm still sitting here typing:lol3

    I usually carry a spare Tubliss tube in my pack but I've never used it.
    Try them sometime.
  11. doyle

    doyle RallyRaidReview-ing

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    And therein lies the difference between "factory" and customer bikes. :lol3
  12. JMo (& piglet)

    JMo (& piglet) Gone a bit Baja

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    Hi Crankshaft - I'm not suggesting they are not a useful alternative to tubes, just saying they are not a [sensible] alternative to mousses, particularly when racing...

    The only benefit I can see with using Tubliss is the ability to run other brands of [tubeless] tyres on tubed rims, and the ability to alter the air pressure - both of which have little baring on rally racing - the best tyres for rallying are all designed to run with mousses anyway, and the 15-18psi range of a mousse seems to be the optimum for heavish bikes, hitting stuff at racing speeds - even in sand? So I can't see how Tubliss would offer any benefit?

    Ultimately you want to minimise (if not eradicate altogether) the chance of a flat, and an air-inflated tyre can still get holed... yes you can plug it, and reinflate with a gas cylinder, but that all takes time you won't want to lose in the middle of a stage?

    With a mousse, it is very rare it would ever go flat (even if it starts to break down with heat, it never goes 'flat') - and if it does start to soften and lose grip on the bead, then the typical trick is to use heavy duty zip-ties to hold the tyre onto the rim for the rest of the stage... straight forward and less than a minute to implement.

    I'm not saying Tubliss doesn't have a place, I'm just saying noone [to my knowledge] uses them in rally racing...

    Jx

    ps. That said, Tubliss might have a place in short course sand events or for extreme enduros in muddy conditions, where you might want to run a softer rear tyre?
  13. skibum69

    skibum69 slave to gravity

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    my mousse's are a bit soft for the 640 but they sure are sweet on the 525:D
  14. F650Dakar_Norway

    F650Dakar_Norway What off-season?

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    Spot on. The "factory" 690's had 700cc (80 plus HP) versus the 653cc ( ca. 72HP )of the customer bikes. Both Pal Anders Ullevalseter and Thomas Berglund converted their 690's last year to 700cc to compensate for the restrictor rule.

    I can however confirm that us mortals with customer bikes don't have to fret over lack of power. It still hauls ass and is a joy to ride in the dirt.
  15. JMo (& piglet)

    JMo (& piglet) Gone a bit Baja

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    I believe there are different 'weights' of Rally mousse, depending on what weight of bike you are riding - like you suggest, a fully-fulled 75bhp 690RR is going to put a lot more strain on the tyres than a 50bhp CRF450 for example...

    And I know there are are different rated front Desert mousses too - Patsy tends to specify the stronger/stiffer version for front wheels (to help minimise dented rims), and of course you'd want to run a Desert specific mousse in a Desert tyre, not a regular MX/enduro mousse (which will be softer, and smaller)...

    Jx
  16. skibum69

    skibum69 slave to gravity

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    true, I knew there were different flex mousse's, I had all my spares for the 525 and threw a set on the 640 for arse'ing around at home
  17. doyle

    doyle RallyRaidReview-ing

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    mmmmm mousse. :dg
  18. Bluebull2007

    Bluebull2007 Adventurer

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    :lol3 Doyle.


    I would be wary of tubliss in a rally for the simple reason if you ding your rim hard (Like I always seem to do), you will be screwed because you cant get a seal.

    If it werent for that I think tubliss would be great.
  19. JMo (& piglet)

    JMo (& piglet) Gone a bit Baja

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    Mmmmmmmm chocolate... x
  20. beechum1

    beechum1 Dandole Gas al Burro

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    Just FYI for those interested in doing some kind of tubeless convert. http://cyb.smugmug.com/gallery/7250813_ZxQA5#465979444_cW2xa many people have had success.