The 10k service report that the dealer prepared made strange reading -

figures are inside, middle, outside in mm

Front right - 4,6,5
Front left - 4,6,5
Rear right - 5,6,5
Rear left - 5,6,5

1- I would have expected the rears on a rear wheel drive car to be wearing down faster.
2- Front are wearing faster on the inside than the outside. Is that normal?
3- tyres seem to be wearing faster on the edges than on the centre. Is that under-inflation?

I have Bridgestone Potenzas on 17's with 6500 miles on them

Normal ? No, definitely not.
Common on IS200 ? Sadly yes it would appear so.
Fronts seem to exhibit wear associated with excessive 'toe-out' alignment.
Speaking to a colleague, I gather Mondeo's are prone to this too.
In the Fords case, it's due to some bushes which wear out quickly.

Coincidentally, i asked Lexus about this earlier today - await reply.
Just had new tyres fitted. Old fronts 4mm or so except inside edge which is bald.
Regular alignment checks (by lexus) - most recently Feb at TTE - always ok.

I've suggested the following possibilities to Lexus ...

1) Static alignment ok but changes once moving - something worn / broken ?
2) Alignment specs in manuals / alignment gear are in error ?
3) Specs chosen by tyre manufacturers - Lexus possibly on commission

See if they have a solution - hope so given that lots of people have the same problem.

I guess it depends on your driving style and type of driving you do. Remember the fronts do the steering and most of the braking.


The standard negative camber will wear the inside slightly more than the outside although it shouldn't be very much. Worth getting a full wheel alignment done.


Yes

80% in london. hardly ever brake or accelerate hard.



whats the difference between alignment and tracking? Where should I get it done?



I run 34 fronts and 38 rear. Usually 2 persons in the car.