Rear tyres uneven wear.

[rfisher]

Just ordered some Toyos as my rears are worn.

Both the old tyres are totally bald on the inner aspect for about 1 inch. The remainder of each rear tyre has about 1mm tread evenly around it.

What's caused that then? Geometry out or do all Tams wear rears like that?

[targarama]

Shouldn't wear like that. Sounds like your geometry needs adjusting to remove some toe-in (or something similarly technical sounding).

I just replaced my rears and they were worn flat. Amusingly the tyre fitter called me out to look at the front nearside tyre (I'd asked them to balance the fronts). He told me the tyre looked a bit feathered on the outside. I replied it was normal. He looked at me. I added that it was normal if you do a few trackdays to get some wear on the edges

[alloypearltam]

As a matter of interest what sort of mileage are you getting out of the rears when the car isn't being tracked?

[targarama]

I got 12k out of my F1s, with track days. You don't have to drive like Tiffany Dell to get around a track you know. Fronts are still well meaty. And no I don't drive like a wuss, I just feed in the power and feel the car instead of spinning it all away.

[2 Smokin Barrels]

Overinflated tyres can wear like that?

[alloypearltam]

targarama said:

I got 12k out of my F1s, with track days. You don't have to drive like Tiffany Dell to get around a track you know. Fronts are still well meaty. And no I don't drive like a wuss, I just feed in the power and feel the car instead of spinning it all away.

Thats pretty impressive really. I get that sort of wear out of the A Class (then again that that car has so many problems it's appallingly unreliable in comparison to the Tam).

[rfisher]

So shouldn't the geometry have been checked at the 6000 mile service which the car had before I bought it?

What's it going to cost me to have it checked and altered?

Not moaning just interested

[targarama]

rfisher said:

So shouldn't the geometry have been checked at the 6000 mile service which the car had before I bought it? What's it going to cost me to have it checked and altered? Not moaning just interested

Hundred quid or so at a dealer. If someone can give you the settings any professional outfit can do it (Protyres branches have some snazzy equipment for instance, branches across the South).

I would doubt the dealer would check the geometry at the 6k service. I suspect most don't check it at PDI either and only do so when owners ask/complain.

Are you running the tyres at 24psi?

[rfisher]

targarama said:

Are you running the tyres at 24psi?

Yes but measured when coldish as the garage is not far away - dunno if that makes any difference.

Presumably a dealer will be able to tell me toe-in, camber/caster settings?

[trackcar]

that sounds from the description like a fairly typical toe-out wear pattern.

It can happen when the person doing the adjustmenst is a muppet.

HTH

[targarama]

rfisher said:

targarama said: Are you running the tyres at 24psi? Yes but measured when coldish as the garage is not far away - dunno if that makes any difference. Presumably a dealer will be able to tell me toe-in, camber/caster settings?

Cold is right. But the garage? Crikey, I hope you are not relying on the garage's guage?!?

[rfisher]

targarama said:

Cold is right. But the garage? Crikey, I hope you are not relying on the garage's guage?!?

I was but obviously I now need to buy some fancy pressure measuring thingy of my own.

What would anyone recommend for long term accuracy?

Presumably the ones that push out a plunger are the most accurate as the distance travelled is a direct measure of the pressure on the plunger?

[targarama]

rfisher said:

targarama said: Cold is right. But the garage? Crikey, I hope you are not relying on the garage's guage?!? I was but obviously I now need to buy some fancy pressure measuring thingy of my own. What would anyone recommend for long term accuracy? Presumably the ones that push out a plunger are the most accurate as the distance travelled is a direct measure of the pressure on the plunger?

They're all pretty good. I use a tiny digital one of which you can buy simlar from Halfords. Plunger ones are probably the most reliable though.

Good Christmas present from a dodgy Aunt instead of socks/pullover maybe?

[alex.mcintosh]

On the Chimaera, a full geometry check was a service item....think it was every 6,000 miles but may have been a 12,000 item. May be worth checking and if it's the same on the Tamora, take it back to the dealer that did the service

[basil brush]

I thought it was supposed to be checked as part of the service. My rears have worn in the middle, which I was surprised at given the relatively low pressures.