Thread: Tyre pressure and Rotation question?

Originally Posted by Baggy

Hi All,

Can anyone tell me the recommended tyre (lbs) you should be running 31 x 10.5 x R15LT tyres on mainly bituman road (no load ...except usual tools, spares kept in back of RRC 2 Door)

Also whats the recommended 5 tyre rotation ie spare to LHF to .....? and where they go from there

Cheers

Baggy

I doubt you'll get response for exact tyre pressure. Maybe just a starting point.

As for rotation. I find the front left on mine wears the worst so it's from there to the spare. Then Front left to rear right. Rear right to rear Left. Rear Left to front right and the spare to the front right. It easier once you draw it. I do that every 10,000km.

It's all good as long as you don't have directional tyres. I don't include the spare in my cars and like directional road tyres so its front the back at 10,000km and then I throw them in the trailer at 20,000km and have the tyre shop spin them on the rims and balance them again.

I also have a tread gauge which I keep track of wear across the tyre so I know if I need to up or down the pressure from how they are wearing. If the centre is wearing faster, up the pressure and if the shoulders are wearing I drop the pressure.

There is a 4psi rule (google it) which gives a good starting point before I can watch the tyre wear.

Happy Days.

Originally Posted by joel0407

I doubt you'll get response for exact tyre pressure. Maybe just a starting point.

As for rotation. I find the front left on mine wears the worst so it's from there to the spare. Then Front left to rear right. Rear right to rear Left. Rear Left to front right and the spare to the front right. It easier once you draw it. I do that every 10,000km.

It's all good as long as you don't have directional tyres. I don't include the spare in my cars and like directional road tyres so its front the back at 10,000km and then I throw them in the trailer at 20,000km and have the tyre shop spin them on the rims and balance them again.

I also have a tread gauge which I keep track of wear across the tyre so I know if I need to up or down the pressure from how they are wearing. If the centre is wearing faster, up the pressure and if the shoulders are wearing I drop the pressure.

There is a 4psi rule (google it) which gives a good starting point before I can watch the tyre wear.

Happy Days.

Spoke to the local tyre fellow, he said modern tyres have turned the traditional rotation theory on its head. His advice was only swap tyres on the same side [ front to back, ], fit the spare in on one side to maintain even wear on your tyres. His rationale was that with the steel belts in modern tyres, after a number of KM's, the belt gets worn in , in the direction of rotation. Shift left to right, the belt will be going against that worn in rotation. And you could get a failure, over time. Now, I have no idea if that is correct, but this fellow has a good reputation, and is said to know what he is talking about. I would be interested in peoples opinion on this. Bob

Originally Posted by bob10

Spoke to the local tyre fellow, he said modern tyres have turned the traditional rotation theory on its head. His advice was only swap tyres on the same side [ front to back, ], fit the spare in on one side to maintain even wear on your tyres. His rationale was that with the steel belts in modern tyres, after a number of KM's, the belt gets worn in , in the direction of rotation. Shift left to right, the belt will be going against that worn in rotation. And you could get a failure, over time. Now, I have no idea if that is correct, but this fellow has a good reputation, and is said to know what he is talking about. I would be interested in peoples opinion on this. Bob

I haven't heard that before but I know setting cruise control on the free way the harmonic vibrations being constant create more heat in the belts which can cause the belts to separate from the rubber. Most people hardly notice it and just think the traction has dropped off due to the age of the tyre. I notice older tyres get soft on the side walls and blamed it on the Federal Hwy when running from Canberra to Bathurst very often when I lived down that way. I read a paper about it years ago.

Happy Days.

Gday Joel, If the centre is wearing faster you should drop the pressure and if the shoulders are wearing up the pressure. To the OP a good start point would be around 35 psi. Paul.

Originally Posted by paulak

Gday Joel, If the centre is wearing faster you should drop the pressure and if the shoulders are wearing up the pressure. To the OP a good start point would be around 35 psi. Paul.

Yeah mate, your dead right. God knows what I was thinking when I typed that.

Happy Days.

Sorry can't help with pressures.

For rotation i cross the rears over,easy if you have a trolly jack handy,then front to rear.

This way every tyre rotates to a different place on the vehicle each time.

Just front to rear and back again next rotation never seems to work well.