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maths

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lambert:
Hi clever peeps,

Whilst I was getting my tracking done yesterday I was reading a poster from michelin that was telling me how many miles of sideways a tyre feels per rotations per mile when the tracking is off. It did not however give the formula so I could do it for my tyres.

So can anyone tell me how to work it out.

Cheers.

dxmedia:
It was on the poster I was reading the tyre place yesterday ;)

If your aliment is out buy say 3mm and the tyre is a 29" - it rotates something like 950 times every mile (simple to work out accurately) and multiply 950 x 0.003 to get how many meters of scrub per mile.

It's a bull [!Expletive Deleted!] calculation though. It's presuming that the whole tyre is moving sideways which it isn't. If the car only traveled in a dead straight line then one side of the tyre would be effected by this, but you move the tyre around on the road which will effect this. It's a case of use shocking (ly bad) maths to scare people.

LandRoger:
There is an easy way over this useless information ,dont read makers blurb there is no better indication of wear than the human eye so when you see wear change the wheels around and if its the tyre edge thats worn then have the tracking done,simples!

tack43:
Is this like tyre manufacturers insisting we NEED winter tyres?

lambert:
I think that is down to people mistaking grip for handling and then needing over wide tyres to feel in control of their car. What that means is that they then can't see how those same tyres don't work properly in winter and they need to be force sold the right tyres to keep the rest of us safe.

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