Correct tyre pressure ?

[Rrrobt]

wats the Correct tyre pressure for my harrier 17' inch ?

 

thanks

[Wolverine]

The answer lies on the side of your driver's door frame .....GO AND USE YOUR EYES OPEN BIG BIG !aahhahaha

[Clubace]

tyre pressure do not change with size...and its all stated at the plate at the frame of the driver's door.

[Burgerdog]

is there any case whereby the profile and the type of tyres are not suitable for the recommended tyre pressure stated at the side of the door?

Or can we always assume the tag at the door is always rite?

Even after we change rims and tyres?

[Wolverine]

how far can it deviate from 220-230 ....stick to that lor ...

[Clubace]

I have consulted some of the forumers here when i changed my profile.....the general concensus is that there is no change in tyre pressure required.

 

In after thoughts, i think this is correct as the weight of vehicle did not change.

 

I guess u will have to look to those more knowledgeable on the tyres to answer you.

[Genie47]

It does. Add 2psi above the stock tire for every inch increase in rim size.

[Wolverine]

yes and that becomes significant if you upgrade from a 13" to a 100"

[Genie47]

Please lah, there is no 100" for road going cars. The most at 17" it is 36psi if the stock is 30psi for 13".

[Burgerdog]

think what wolverine is trying to say is that it does not really deviate much from the stock tyre pressure unless you have a LARGE change in tyre size...

[Contax]

wats the Correct tyre pressure for my harrier 17' inch ?

 

thanks

As a general thumb of rule , 230 is sufficient .

 

Underinflat , you will have better road holding especially during wet days but your FC will suffer.

 

Overinflat , you ride will be more bouncy and have that "floating feeling".You will lost traction easily plus your tyres will wear out faster and may explode easily.

[Genie47]

There will be a problem with underinflation. Experienced it myself with an inch increase in size. Tire wear became uneven. Between 13 and 14 inches, nothing much happens but somehow, bigger rims will usually mean lower profile tires. There is some relationship in this, I forgot. Usually this happens for those 15" and above.

[Soya]

eh, he got 2ltr v-tek wor. his car always so fast can jiak everyone so maybe needs 100" rim to handle all that power.

[Burgerdog]

Really?

But how did you arrive at the figure of 2psi per inch increase in rim size?

Is it proven or studied?

 

Sorry for the questions, but I just wanna really make sure...

 

Thanks

[Genie47]

Its not really a rule of thumb but they are figures you can use to start off. As long as the tire sizes are different from stock. Confirm you cannot use back the stock tire pressures. 2psi difference is enough to make car a completely different creature.

 

One way to find out is to pump the tire pressure you sort of need like lets say 32psi because you upgraded to 15" and the stock was 14" at 30psi.

 

Take the car out for a spin around. I really do mean spin. Go round and round in a circle clockwise and then anticlockwise. Have a sort of feel on the handling. From there, reduce pressure or increase pressure.

 

When it comes to tires, comfort is not the important part. Handling is. Want comfort, stick to the stock tire sizes.

 

Another way to arrive at figures for front and back tire pressure is to take the vehicle weight in lbs/100 +2psi all round but add 2psi more for the heavy end.

Edited April 12, 2006 by Genie47

[Burgerdog]

Thanks for the info...

Will bear this in mind the next time I pump the tires...

 

Thank again for the advice...

[Kiatmobile]

wats the Correct tyre pressure for my harrier 17' inch ?

 

thanks

 

I saw a Harrier with 17" type and he pump pressure at 300psi...

 

I was shock!!!

[Soya]

the extra 2 psi is recommended to bolster sidewall support as upsizing usually results in a lower profile aka less rubber.