Tyre Rotation

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Originally Posted by GlennWA

Pardon my ignorance but what is the 4 psi rule?

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This will expalin it better, but's basically a accepted way of measuring the correct tyre pressure for the weight of the vehicle and a given load.

4psi Rule

Joining the concept very late. Have nearly 80K on the Defender tyres. They have never been rotated and have all worn evenly. They now probably have approx half the tread of the spare.

I assume it is now to late to start rotating and introducing the spare.

Although I am very happy with the tyres it came with they may not be the ones I go with on replacement and I'm loathe to get rid of an unused tyre.

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Originally Posted by GlennWA

The workshop manual for the Puma are posted elsewhere on this site. On page 183/1479 it states "WARNING: Always use the same make and type of radial-ply tyres, front and rear. DO NOT use cross-ply tyres, or
interchange tyres from front to rear."

Make of that what you will but the fact that the owners manual states a similar thing makes me wonder why not?

Anyone got any ideas?

EDIT: Reading further "NOTE: DO NOT attempt to interchange tires, e.g. from front to rear, as tire wear produces characteristic patterns
depending on their position. If tire position is changed after wear has occurred, the performance of the tire will be
adversely affected."

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I would think it would be interpreted as "substantial wear", as in if feathering had occured on the tyre. When you then turn the tyre around, they sing like birds,,:eek:

I got my 100,000 km's all highway driving at 100kph. (I only drive it to work and back) using BFG all terrain's. If you think about it, if you rotate every 5000km's over 100,000 km's, your tyres are only doing 80,000 km's on road and 20,000km's as the spare.