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Technical Tires

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Technical Tires

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wrcarmo

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Good day.
Would like to knowyour opinion ontires formy car
My Fiat1.3 Multijet 90HP GPunto Sport has 205/45/17 88V series tires mounted, but the question is, i can use205/45/17 84V safely?
The weight ofthe axle is 950kg front and 850kg ago.
Thank you for your help.
 
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I looked into the same thing when I last bought tyres. I was surprised to find that the maximum permissible front axle load on my t-jet was high enough to require the 88 load index, the rear did not. I can't remember the exact loads that 84 and 88 can take but google will know.

It's extremely unlikely you will ever load your punto in such a way as to exceed the 84 rating but for insurance and mot reasons I stuck with the 88s.
 
jameshobiecat said:
I looked into the same thing when I last bought tyres. I was surprised to find that the maximum permissible front axle load on my t-jet was high enough to require the 88 load index, the rear did not. I can't remember the exact loads that 84 and 88 can take but google will know.

It's extremely unlikely you will ever load your punto in such a way as to exceed the 84 rating but for insurance and mot reasons I stuck with the 88s.
Click to expand...


Thank you
The maximum load:
88 = 560 Kg
84 = 500 Kg
I do not know if the accounts can or should be like this but:
Knowing the weight of the front axle is 950 kg and divide by 2 gives in 475Kg each wheel.
If we put 88 have a tolerance of 85 Kg.
If we put 84 have a tolerance of 25 Kg.
So the margin of safety is small
Thank you once again
 
Yes that looks like the right figures. I seem to recall there was usually a minimum margin of 10% or something as the car isn't always going to be loaded evenly left to right.
 
Tom, you miss-understand, the maximum axle loads are the maximum safe/legal load when fully laden. It is these which are used to calculate the tyre load index.
 
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