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wheels-inmotion

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    citreon

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  1. You say you have a full report, does this include the front camber and castor, if yes what are the final positions?
  2. The reason it should be measured is to ensure the problem is not the castor! As for the question "what is" the castor position, i'm not sure if you want the actual value or an explanation of castor? Ken gave a good example but in essence the castor has many duties, do you want me to explain them?
  3. All new tyres have visible coloured markings forming a radial band on the tyre. Several of these markings represent destination between the manufacture and the recipient.... Cars like Lexus require specific compounds so the radial markings do indeed allow the process to become visible and act like a bar code. But there is also important information held within those lines that most consumers and tyre centres are not aware of, in particular the position of the outer line (colour does vary)..... Depending on how the belts are positioned during construction imperfections will allow the casing and the tyre tread to 'run out'. This disparity allows the compression to steer the tyre laterally regardless of any actions taken by the driver thus generate a pull. The manufacture measures the degree of run out and marks the severity onto the tyre by the position of the outer band, typically the colour is Red or Blue, if the colour band is central then the run out is considered 0, if the band is toward the outer edge the tyre will need a 'reactive' partner to belay any pull. So the positions are vital to you and your car.... Realising this problem then it's easy to conclude if the tyres are symmetrical in tread construction, if the tyres are asymmetrical or directional then the centre will need to find a suitable match with an opposite reactive lateral partner....... Their problem not yours...... So next time you buy tyres have a look for the banding and decide what match you want..... remember most centres will have no idea of your request due to misunderstanding and lack of knowledge so you need to be wise.
  4. Be sure they measure the castor position!!... It's not adjustable on the car but it's a vital part of the overall diagnostics. Since it's not adjustable many centres don't bother to measure it despite the fact it's part of the image you pay for within a geometry.
  5. No.... Front "toe/ alignment/ tracking" is the only angle on a car that's shared. If let's say you hit the kerb and displace the front near side toe by 10mm then as soon as you steer ahead the toe angle will be shared between each wheel 5mm/ 5mm. The reason for this is the fact the toe angle is linked via the steering rack, the only evidence there's a problem would be an off-set steering wheel.
  6. No modification is without consequence, evermore so when you go low.... I recommend the same as the post above, up the pressure and move the toe angle.
  7. Up the tyre pressure by one or two psi and have the toe position moved toward positive.... This will minimize the damage.
  8. If the wear is around 10% of the tyres total width and smooth then the problem is camber, no amount of toe manipulation will help resolve this. A move in the camber to around -45' to -1degree is a sound platform assuming you have adjustment available?
  9. The camber positions are consistent with the lowering and will generate tyre wear..... Why didn't they correct the toe angles?
  10. At 19mm it's hardly worth the expense of further measurements since this was clearly the problem..... Makes you wonder though, how the hell can they get it 19mm wrong?
  11. Odd one.... Unless the new coil had the wrong rate i:e to low compared to the OSF then it shouldn't pull left, if anything a "new-V-old" would pull right. Can we clarify things * When driving straight the steering position is left hand down * If you relax the steering does the car drift left? * If it's a pull do you have to resist the pull * Did the dealer align the car after the coil install.... this is common practice.
  12. I would go for the full image, that way if there's any camber issues you have the option to deal with that before the tyres wear out.
  13. If the wear is on the outside then reluctantly i say yes to basic laser alignment.
  14. Since the trigger was the tyre fitment then it's wise to assume this is the reason the cars handling badly... Sorry to say sometimes the tyre and the car sometimes just don't work together.
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