Mich Pilot Sports.

Steve

For the record, mine were Conti Sport SP3's.

Dunlops are terrible.

We see the same type of tyre wear on anything A5, 3C Passats are awful for it.

And how much adjustment is there on the rear geometry?

Steve

Before the car went to Skoda in June, the rear tyres had done 30000 miles with even tread accross the width. They were only replaced as they were saw toothed.

Steve

I'm a little confused now, when I seen this originally thought there was 10k on the tyres, seeing as it may be camber I figured there was 10k on the car.

Now I see you post saying with 30k and even tyre wear :confused:. Was it okay and went out with the last set of tyres?

The original rear tyres did 30k ish. I had new tyres as they had ‘sawtoothed’ and a full alignment (or what ever the dealer called a full alignment) done at the same time. There was even wear across the width of the tyres up to this point. They were o nly replaced to cure the rumbling noise a saw toothed tyre gives.

So in the last 10k miles the new tyres have shredded, after the alignment.

It’s at the stealers on Friday. The lease company are bringing it up with Skoda UK too.

Steve

So it sounds like the alignment adjustment at 30,000 miles messed everything up resulting in the excessive inner tyre wear; to trash a set of tyres within 10,000 miles. :eek:

'Sawtooth' tyre wear (I presume you mean that the tread blocks were worn more at the front than the back and thus had become wedge shaped) is not uncommon on front drive cars as the rear tyres are only ever used for braking and not acceleration.

In hindsight, perhaps the alignment should have been left alone at 30,000 miles and the tyre just rotated (the rear pair switched left to right and vice versa).

So it sounds like the alignment adjustment at 30,000 miles messed everything up resulting in the excessive inner tyre wear; to trash a set of tyres within 10,000 miles. :eek:

'Sawtooth' tyre wear (I presume you mean that the tread blocks were worn more at the front than the back and thus had become wedge shaped) is not uncommon on front drive cars as the rear tyres are only ever used for braking and not acceleration.

In hindsight, perhaps the alignment should have been left alone at 30,000 miles and the tyre just rotated (the rear pair switched left to right and vice versa).

What you have said is exactly what I think the root cause is.

Although I don't see that asking a reputable, supposedly competent dealer to carry out a simple alignment check should subsequently result in the destruction of a set of tyres. This should be a routine task for them, one which in this case they have failed to do correctly, verging on negligence.

Steve

I had a similar issue with my old Mondeo. It had the rear subframe bushes replaced at a main Fraud dealer, and part of that was a wheel check.

Immediately after driving it felt plain "wrong". I took it back to Fraud again, they said "we checked it again and it's fine".

So, I took the car to my local tyre place and paid for 4 wheel aligment out of my pocket. Basically the rear alignment was off the scale - he showed me on the car, and printed it all off for me.

I took the recceipt and cover letter in to the garage and handed it over. I spoke with one of the technicians who admitted they didn't even have the equipment for 4 wheel alignment, and it should have gone to another garage (but they couldn't get it in).

I got absolutely feck all apology but did get a full refund on the 4 wheel alignment.

Thinking about it now I should have pressed for a full refund on the whole repair and gone to Trading Standards. It would have turned into a he said / she said contest though. Never mind the 3 trips and time off work instead of the original 1 visit. Needless to say I never went back there and actively warn people away from them.

Negligence - sounds all too familiar.....

I'd have thought your company and the lease company would be freaking out at such a clear safety issue. If you'd have been pulled by the coppers, you would have taken the fine and points presumably.....

Good luck

Just to let you know the same thing happened to me with the 'latest technology'. I did about 40K with my first set of tyres - did a bit of swapping front-to-back to get that. Had a completely new set fitted (same brand - Bridgestone), and was offered the 4-wheel alignment at about £60 extra. I was shocked after less than 20K to find the inside wearing very badly as you described. Took it back to the fitting shop who fiddled about with it, swapped tyres around, and I've been able to get another 10K out of them. I've just swapped the car for a new one, but I noticed before we parted company that they were on the way to wearing badly on the inside again. Next time I won't go for 4-wheel alignment in a hurry.

I had similar wear on the front of my Fabia Estate - scared the **** out of me frankly. Will get it aligned once Mr Lummox has finished the job on it though

So it sounds like the alignment adjustment at 30,000 miles messed everything up resulting in the excessive inner tyre wear; to trash a set of tyres within 10,000 miles. :eek:

Thats exactly what I was thinking. I think I'd be talking to the dealer about the rear tyres that were made a mess of by his **** up.

'Sawtooth' tyre wear

What does that look like?

Thats exactly what I was thinking. I think I'd be talking to the dealer about the rear tyres that were made a mess of by his **** up.

I have the tyres in the boot. I'll be leaving them on the service managers desk.

Steve

Knew someone who had the same wear problem at 8K on a Porsche Carrera and was told it was normal for someone who did not drive the car hard enough:eek:

Thats exactly what I was thinking. I think I'd be talking to the dealer about the rear tyres that were made a mess of by his **** up.

What does that look like?

Have a look at a wood saw blade; each 'tooth' is triangular but one edge is vertical, the other canted over at 45-30degrees.

OK?

Does the Octy 2 have something other than a torsion beam on trailing arms at the back end? I'm asking because one of the benefits of a torsion beam is that the camber angle remains constant irrespective of load.

The Octy II is fully indy suspension front and rear.

In which case extreme loads could push the camber angle up, and running low pressures will increase the wear on the inner shoulders still further.

We've the same problem with the well loaded up cars at work, both the Vectras and Octavias suffer. Outside of the rear tyres are perfect, inside are well worn. Both seem to end up with new tyres every 12k service.

Have a look at a wood saw blade; each 'tooth' is triangular but one edge is vertical, the other canted over at 45-30degrees.

OK?

I figured that from the name of it .........but how's it normally caused?

Well the dealer diagnosed that the alignment was out but refused to admit that it was their last alignment that was at fault. They have given me a printout of the session but to be quite honest, I can't make head nor tail of it. I'll scan it in and post it up for every one's opinion.

One thing I do know is that my steering wheel is now off centre which I know means they cocked something else up!!

Steve

It would be interesting to see it.

I figured that from the name of it .........but how's it normally caused?

When braking the leading edge of the tread blocks on a tyre get squashed more than the trailing edge, due to the transfer of weight etc. and when accelerating the trailing edge of the tread blocks take the strain.

On a front wheel drive car the front tyres are used for both accelerating and braking so the strain on the tread blocks is roughly equalised. The rear tyre, as they are used for braking only, have the tread blocks getting their wear on the leading edge only and hence finish up wedge shaped; creating the sawtooth effect.

When braking the leading edge of the tread blocks on a tyre get squashed more than the trailing edge, due to the transfer of weight etc. and when accelerating the trailing edge of the tread blocks take the strain.

On a front wheel drive car the front tyres are used for both accelerating and braking so the strain on the tread blocks is roughly equalised. The rear tyre, as they are used for braking only, have the tread blocks getting their wear on the leading edge only and hence finish up wedge shaped; creating the sawtooth effect.

I see how this works from a theoretical viewpoint, but I've never seen why it works in practice, given that the weight distribution of a lightly laden FWD car can go to something like 90/10 before the ABS fires (is fitted).

This wear on the inside edge of the rears seems very common. The other half had her rear tyres changed at 30 000 with uneven wear on a 2.0 TDI L&K. My vRS TDI estate is sill on originals at 54 000! Carting a boot load of tools and spares around every day too! Check them regularly and seem to be wearing evenly, but getting a bit noisy now though!! Fronts lasted to 42 000 also. Think you are a bit unlucky. Still, good point about keeping an eye on tread depth across the WHOLE tyre!

I've managed to get the print out scanned. Comments and observations please!

RNHECC001.PDF

Steve