Recently had 4 wheel alignment and I can see that the rear right is out by +0.25 on the toe.

Reading around I see that the rear axle in non adjustable, could it by my rear arb pushing it out?

Also unsure what +0.25 equates too.. overall is highlighted as OK but I can see a slight increase in wear on the tyre.

Cheers

Malc

Edited 15 June, 200917 yr by Malc

Have the same problem on mine since fitting stiffer rear arb, although mine is n/s/r tyre wear on the inside. Also have had 4 wheel alignment check that shows rear geometry is now out.

Forgot to mention that i also have koni,s on all 4 corners so that might have also effected the problem.

Did the alignment check the rear axle thrust axis (or angle)?

Failing which, can you post the results?

PM me and I will send you the PDF Running gear Manual for Octavia.

Front ---

Camber -

Left -0.37

Right -0.25

Toe

Left -0.02

Right -0.03

Total -0.05

Rear

Camber -

Left -1.34

Right -1.20

Toe -

Left 0.07

Right 0.25

Total 0.32

Thrust angle -0.09

Green = within specifications (apparently)

Red = Outside of specifications

The . in the figures = degree's symbol

Getting a small but vannoying vibaration through wheel at 75ish, balancing has been checked, could be psychological but its getting on my tits :thumbdwn:

Looking at that, I think the excess RHR toe angle is causing your tyre scrub, Toe on the Octy 1 is normally non-adjustable, but in this case, I think it might be possible by reseting the thrust axis to full parallel becaue the LHR toe angle is below minimum.

mmm, I have mine tweeked a while ago, and then I changed a front tyre, and tracking was checked again, and mine was 4 deg out (however that is probably because the steering wheel was not straight once the first place had finished monkeying about). However ever since the correction of the 4 deg, the car feels very skittish on the road, and even crossing over a white line makes the car almost feel a bit out of control at times :-( I have a PDF somewhere showing what mine was.

It was a protyre, they didn't want to touch the back due to the rear arb..

Its driving well, just a lil more wear on right hand rear and a slight (OCD) vibration at speed. I'll have a chat with the guys at JKM when I pick up new discs and pads for the front shortly.

Cheers

Are the rear wheels on a stub axals ? If so couldn't you just shim behind that to get the correct toe? thats what I've done to get more camber on my Fav and the same thing could be done for toe in and out.

Stubs on a torsion beam. Hence the suggestion of correcting the thrust axis. Otherwise shimming the stub to trailing arm joint makes sense.

Just been reading about thrust angle - Wheel Alignment A Short Course Angle

Spec I believe is between 0°10 and 0°20 - If my logic is correct it needs pivoting left exactly 0°09 which sounds minimal? That would then equal both wheels at 0°16 which is well within spec.

Does 0°09 equate to 0.09 degrees in real terms?

yes it is 0.09 degrees, which in real terms is less than a gnats ****!! in my experience a devience of such minimal proportions would be unlikely to cause tyre wear problems. when i worked at a vw dealer, part of the pre-delivery check was to carry out a 4 wheel alignement, and virtually every car was out, both front and rear and they were brand new!!! even now when doing 4 wheel alignements i rarely find a car with rear wheels in alignment

Useful site I wasn't aware of Malc; thanks for that. You and Ben are right about the 9 minutes not being much; the only reason for suggesting changing it was because, if the thrust angle was 0, it would pull both rear toes round into spec.