What Tyres Do I Need To Raise My Load Rating?

Discussion in 'Motorhome Chat' started by rosalan, Jul 5, 2015.

  1. rosalan

    rosalan Funster

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    Recently I had my van weighed by the Tech people. They told me that I was 30kg overloaded at the rear, but because I have air-suspension fitted, I could buy tyres with increased load rating.
    At present, like many vans I have VancoCamper tyres fitted (215/70 R15 CP 109R), what tyres should I be looking to buy to increase my load rating please. I would like to shop around when I know what I need.

    Alan
     
  2. Minxy Girl

    Minxy Girl Funster Life Member

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    For only 30kg to be honest I'd instead be looking to see where I could lose or move the weight, ie by shedding some kit, or transferring some of the heavier items to the front, assuming that the front axle weight has sufficient spare capacity and it would still be within your overall MAM.

    Once you've paid for your new tyres you'd then still have to go through the process of uprating/amending your axle capacity figures with SV-Tech at a cost of £312.
     
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  3. scotzsue

    scotzsue Funster

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  4. Techno

    Techno Funster Life Member

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    First port of call would be a 225
     
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  5. Techno

    Techno Funster Life Member

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  6. Techno

    Techno Funster Life Member

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    Last edited: Jul 5, 2015
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  7. Techno

    Techno Funster Life Member

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    112 load index will give you 90 kg per wheel over a 109 load index tyre

    Member @Brian and Jo is best placed to answer your question with authority (y)
     
  8. rosalan

    rosalan Funster

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    Thank you Andys, Minxy and Oops Scotzsue for your help and warnings.
    It was SV-Tech that weighed my van and said I only needed to change two tyres. For the life of me, I do not understand how I can be putting any less weight on my axle by changing the tyres but I bow to their greater knowledge.
    I thank you all for I was not sure which number represented the weight carrying capacity of my tyres, which I now understand is 225 instead of 215.
    Alan
     
  9. TheBig1

    TheBig1 Funster Life Member

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    215 is the tyre width so a 225 is 10mm wider/taller

    109 is the load index
     
  10. tonka

    tonka Funster Life Member

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    I am confused as well..
    If your 30kg overloaded, changing tyres you will still be overloaded ???
    Ok the tyres will take a heavier load but your legal / maximum rear axle weight is still the same, as stated on your weight plate....
    Do they mean, change the tyres and then you can be upgraded ( at a cost).. ?
     
  11. Minxy Girl

    Minxy Girl Funster Life Member

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    Their KNOWLEDGE in this case appears to be lacking as far as I can ascertain!

    Before you do ANYTHING else go and get an independent weight check done on a proper weighbridge, with both front and rear axles done separately and compare them to your weight plate. If, as I suspect, this weight check was done at a show I believe others have commented on the 'innacuracy' of these and the 'over-reporting' of the weight on the axles, and when they had their MH weight confirmed on a standard weighbridge it was a different story and the weight was lower ... thus making the uprate unnecessary.

    AFAIK there's no way you can uprate the rear axle plated capacity of your MH just by replacing the tyres and doing nothing else, it sounds to me, as I suggested earlier, that this is the first stage in the process and then you would need to continue with a weight upgrade via SV-Tech at a cost of £312.
     
  12. NickNic

    NickNic Funster Life Member

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    In the OP he says he's already got air suspension so he quite probably can get an upgrade just by changing tyres in this case. If he didn't have the AS you would be right. You're also right that the process has to be followed through properly and a new weight plate fitted.
     
  13. Shrimp64

    Shrimp64 Funster

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    Sounds like 'they' are 'trying it on'!
    I can't imagine how bigger/stronger tyres can suddenly make your van capable of carrying more weight! Legally that is.
     
  14. NickNic

    NickNic Funster Life Member

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    On their own they can't but when paired with air suspension they can allow you to update the rear axle.

    The OP already has the air suspension hence the advice to only change the tyres.
     
    Last edited: Jul 6, 2015
  15. Charlie

    Charlie Funster

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    We have "Air" on our van and in the instructions is states that having it does not increase the load capability.
    Its there to aid ride quality and give a certain amount of leveling capability .
    Increasing the load capabilities of your tyres will not mean you can carry more gross vehicle weight.
    If you are weight checked and are over then you are over and what suspension or tyres you have will matter not.
    As others have said look at shedding some weight elsewhere if possible.
     
  16. tonka

    tonka Funster Life Member

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    Not quiet right... !
    Just adding AS yourself, as you say does not allow / increase the payload. In most cases it is used for ride improvement or to increase the ride height.
    But My previous Apache 700 was rated at 3850. SVTECH advised to me to have AS fitted and then I WAS able to replate up to 4100kg. There was also an increase load on the rear axle but I cant remember what that was.
     
  17. Charlie

    Charlie Funster

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    The handbook states categorically that Air does not increase the GVW . So with respect that's surely got to be the guide ?

    If the unlikely were to happen and lets face it it is unlikely and we find ourselves on the weighbridge the GVW is the GVW end of.

    There would be no defense quoting some chap of the internet no matter how ell intended said it would be fine.

    If you like I will get the book and quote verbatim what it says ? But be assured it does not give licence for us to exceed the given GVW.
     
  18. TheBig1

    TheBig1 Funster Life Member

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    SVTech and other specialists are engineers registered and accepted by DVSA to perform the calculations needed to up-plate a vehicle. as an individual it is nigh on impossible to up-plate a vehicle as you need to have the relevant qualifications.

    increasing the load index so the weight carrying ability of the tyres on an axle will help, as will uprating the suspension with air bags. These are facts and there is a proven record and paperwork to prove that the neccessary work has been carried out to comply with the up-plating of a vehicle

    You CANNOT just replace tyres and add air assisted suspension, then claim that the vehicle can carry extra weight. the engineers calculations and report is what you pay the specialist engineer for.

    SVTech may be the most well known engineering firm in this field and they use this virtual monopoly to charge more. however there are independent engineers that do the same for 1/3 of the cost
     
  19. tonyidle

    tonyidle Funster

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    Of course SVTech might simply be saying that the vehicle is already within its plated weight but that the rear tyres are under-rated for the plated weight?
     
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  20. NickNic

    NickNic Funster Life Member

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    You can sometimes get a bit more on the rear axle without changing the maximum weight.

    They suggested this for me when we uprated but I haven't done it because we don't really need it. We're at the highest MTLPM we can go to but by adding air suspension and changing the tyres we could update the rear axle by 200kg. We would still have to remain within the existing MTLPM though.
     
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