Tony-Bones

Good stuff, i'm pleased all's still well, oh and i remember the car very well!!

These are the partner centres we have around the UK http://www.wheels-inmotion.co.uk/tyre-fitting-centres.php

Your welcome..... It's been a while since i've been here but i'm getting a steady flow of "help emails" recently so i thought i would bring this to the table again to help members.

What's the symptom's Front inner tyre wear involving about 10% of the total tyre width What's wrong? This bit's tricky to explain so stick with me.... The front camber position suggested for the IS200/300/SC is unremarkable but the pattern of wear is definitely camber related since the wear is so confined. So!! We found out the Lexus IS200/300/SC has three different Castor positions around the globe, Asia, Europe and GB but the Castor on the IS is a fixed angle? What's Castor? Outside of KPI/SAI "steering axis inclination" Castor is one of the most difficult angles to explain since it doesn't really exist? It's a position born from the steering upper and lower pivotal points, in all modern cars the lower pivotal point is forward from the upper, this is called positive Castor. Duties During a turn there are many geometric complexities going on that involve the Castor, the one that concerns us is the Camber migration? Migration As said the IS200/300/SC has unremarkable front static Camber positions, yet has historic Camber tyre wear and there's three Castor positions around the globe despite the fact the Castor is not an adjustable angle, so what's going on? The IS front static Camber position looks like this / \, during a left turn the angles, thanks to the Castor and other unmentionables migrates to this \ \, the problem we have in the UK with a low Castor angle is the outside wheel leans over to far during this hypothetical left turn. Summary Lexus UK are well aware of the problem but because the solution would be a "part replacement" they never excepted this since it is a build issue, other manufacturers offer new build solutions for the field geometrically as and when problems evolve, normally this is nothing more then new target position replacing those that simply don't work. Solution The steer axis pick up points are not made or positioned at right angles so it's possible to influence one angle by adjusting another... Several years ago i researched this possibility for this club using some donor cars. Conclusion A small change in the front OEM camber positions dramatically displaces the Toe position, correcting the Toe indirectly moves the Castor forward.. Simple. My thoughts A despicable situation that Lexus deny by claiming this a trait of the car "utter bollox". No manufacturer designs a car to wear front tyres to the wire in 5k, anyway you now have an explanation and actual data can be found in this clubs knowledge base

Nothing is a sure bet, even tyres, why not simply slow down, ever more so with kids in the car.

Alarm/ imbobalizer?

Monster Mat has adjustable tie rods on the drifty.

Nothing geometrically can wear the inside and outside so it seems like a pressure issue.

No it's not normal, reads like it has a Toe issue.

We can argue trading standards this and court that until we are blue in the face.... Do what you need to do. Facts are before the dampers where fitted you had a knock, after they where replaced you had a knock, it doesn't take much gray matter to realize the knock wasn't the damper! Trying to redeem your loses on this ridiculous "rubber" bump stop being fitted upside down as the reason for the knock is way off reality. To preserve any future legal action i won't post anymore comments in LOC on this topic and i advise you do the same. Please note. 1:GAZ suspension are willing to confirm bump stops cannot knock however they are fitted. 2:Unproven litigation in a public forum that displays harmful consequence's to the said company opens you to a claim of a loss to our credibility. 3:LOC is innocently acting as a porthole to this argument and should close the thread in order the litigation no longer aides the unproven claim by yourself.

For the full picture, you had been chasing a knocking noise at the front, you decided to replace the drop-links and dampers which we fitted. Admittedly one of the links came loose, which i paid Lexus for a replacement and i paid for the fitting. Needless to say the knock was still there to which Lexus said we had fitted the bump stops upside down. As i explained to you the bump stop "cannot" knock, it's made of rubber and sits at the top of the damper shaft, this was confirmed to me by GAZ suspension. Nevertheless we turned them and i paid for your fuel, needless to say the knock was still there. As a sign of good faith i offered to inspect the car free of charge to which you declined. Saying i "washed my hands of it" was not the case. We are members of the Retail Motor Federation and comply to all the standards within, please feel free to complain to them.

Unproven litigation is not wise in a public forum. May i also remind you the £380 Lexus want is to replace "your defective parts", i'm not going to be held accountable for that!

I'm pleased she's sorted and your happy, as for the super cars, you missed this> http://www.wheels-inmotion.co.uk/forum/ind...ic=5138&hl= about 1.5 million pounds worth of cars just appear!

Domestically camber offers severe wear, whereas toe does not. -2.5d on a Lex would be hard to acquire without additional adjusters and to be honest a wast of time. Outside of Drift not even our race cars run more than -1.5d camber? Nevertheless if the cars a show car then -2.5d looks superb :)

Does it also solve 'heaviness' ? Or might the fact i find ours not very agile be caused by a tw@t doing the geometry. I sure don't see any negative camber on ours. Heaviness is not a common complaint on the IS so something is amiss.

The thread is aimed at the IS200.

Just to explain.... LOC asked wim several years ago to investigate the alarming front tyre wear issues with the IS200/300/SC, we addressed this and gave the club the final settings for all "in gold" to see/use. The real problem with the cars is not the camber but the non-adjustable castor and it's relationship with the camber on the corner. The procedure we evolved indirectly adjusts the castor and solves the wear problem without replacing suspension components.

Everything at the rear is set to stock positions....... Front Camber -10 to -15' Castor will indirectly adjust more positive and may even violate UK positions, don't worry about that. Toe: stock: When the camber is adjusted it will dramatically displace the toe, this is necessary to indirectly adjust the castor so don't worry about that. A good technician may comment the toe correction will reduce the lock angle, this is true but only noticed by the 3.5 turn rather than a 3 point turn.

Problem is "Some" testers set their own standards?

Cars live most their life in the realm of "worn", this is a period where it's not new nor is it worn out. In an ideal world all the bushings would be replaced and the suspension would be new. The problem is the term "worn to excess", at what point does excess become a reality? it's opinionated.

If you have wear solely on the outside and mainly the NSF tyre then the problem is toe. If you have prominent wear on the inners then the problem is camber/castor. I re-wrote the chassis settings for the Lexus some years back and the settings are available here in the clubs knowledge bank.

I have replace both already. Just what I was afraid off, I just got done the geo 2 months ago set me back £100 Thank you for that Ade If we did the geo then i will re-do it for £40 if that helps.

Your very welcome, thanks for the kind words.

Most, if not all tyres in the Lexus size are XL (extra load) so suitable to cope with the cars weight, actual grip levels between them is another matter. Resilience toward the chassis settings or not would apply to all makes of tyre.

cheers mate cant get it to work ill put up my settings front axle total toe +00.12 camber +00.37 caster -00.55 king pin angle -01.94 rear axle total toe +00.26 camber +00.29 thrust angle +00.01 can anyone help please Those figures cannot be right..... pm me your contact number and i'll call. i think ive put them up right if you give me your email address il forward it to you to take a look at it thanks tony@wheels-inmotion.co.uk