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Subject Topic: twin axle tyre pressure Post Reply Post New Topic
Personrazzmick
03/9/2012 at 5:26pm
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hello how can i work out the tyre pressures on my twin axle i have no manual so carnt check on their help please ?????

  • Year - 1990
  • 5 berth
  • TWIN axle
  • Mass in Running Order (Kg) - 996
  • Maximum Allowable/Authorised Weight (Kg) - 1295
  • Internal Length (metres) - 5.56
  • Shipping Length (metres) - 7.2
  • Width (metres) - 2.14
  • Awning Size (cm) - 960
  • Layout - DD


    • Post last edited on 03/09/2012 17:42:31

    Post last edited on 03/09/2012 17:43:07


    PersonBasilbrush
    03/9/2012 at 7:10pm
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    I'd ask at your local caravan dealer or tyre company if I were you razzmick. Ours is a single axle with 185/14 tyres & the pressure of 51psi is printed on the sidewalls but yours could well be very different due to it being a twin axle.

    If you post your tyre size you stand a good chance that someone on here will have a twin axle van with the same size tyres on it & they might reply.

    BB



    Post last edited on 03/09/2012 20:08:13


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    Persondeltaman
    03/9/2012 at 7:27pm
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    Persondeltaman
    03/9/2012 at 7:30pm
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    Sorry for the above blank post, had a senior moment.

    Razzmick our twin axle had tyre preasure of 32psi, twin axle's have very much lower  preasure's because the weight is spred over 4 wheels, but check with your dealer to be sure.


    PersonAl+Mel
    03/9/2012 at 8:53pm
     Location: Hants
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    You can find the load rating and max. pressure from the tyre sidewall.

    Ours is 82 - so that is 475Kg per tyre (1900Kg for all 4). Max pressure on ours is is 44psi. Our MTPLM is 1750, so the formula would be 1750/1900 = 0.92 x 44psi = 40.50 psi.

    Our manual says 36 psi though.   


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    Personnavver
    03/9/2012 at 10:05pm
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    Need to take the nose weight away from the MTPLM


    Personarc systems
    03/9/2012 at 10:19pm
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    what size tyres are fitted and what is the load index number, this is the number shown after the size on the tyre sidewall


    Personalpiner
    04/9/2012 at 5:55am
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    have a look at this handbook, page 8 (twin axle vans).    
    I use 35 lbs
    tyre pressure

    -------------
    alpiner


    Personjoecroft2
    04/9/2012 at 9:59am
     Location: Swansea South Wales
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    my manual says 36 PSI , thats on a Lunar lexon 640 T/A

    -------------
    Luvly Jubbly


    Personmichael
    04/9/2012 at 3:32pm
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    depends on tyre size and type (ie.ply) and caravan weight.

    http://www.tyresafe.org/tyre-safety/caravan-tyre-safety/load-and-inflation-tables



    -------------
    the only silly question is the one you do not ask.


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    Personrazzmick
    04/9/2012 at 5:46pm
     Location: worksop notts
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    thank you everyone contacted bailey and they gave me the info 35psi


    Personmichael
    04/9/2012 at 8:11pm
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    just read you can get a bailey manual going back to 1983 if you need one.ring the printer in derby...........01332549278  cost £13 inc post.

    -------------
    the only silly question is the one you do not ask.


    Personarc systems
    04/9/2012 at 8:57pm
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    Quote: Originally posted by Al+Mel on 03/9/2012
    You can find the load rating and max. pressure from the tyre sidewall.

    Ours is 82 - so that is 475Kg per tyre (1900Kg for all 4). Max pressure on ours is is 44psi. Our MTPLM is 1750, so the formula would be 1750/1900 = 0.92 x 44psi = 40.50 psi.

    Our manual says 36 psi though.   


    this is why I always ask the size and load index number, I'd guess your tyres are 155x13 reinforced which regardless of 'maximum' pressure stated on the tyre, are only quoted up to maximum 42psi actual pressure for the maximum stated load. So calculating a working pressure from 44psi is going to be way out.
    Assuming then I'm right on the size?, in this case maximum working pressure is only 39psi at 475kg and 36psi is bang on for a total of 1700kg.



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