Goodyear runflats - a warning

[jonnie5]

I've had the rear tyres on my 535D changed this morning. I seriously considered changing all 4 for non-runflats but as I had so much wear left on the fronts I though I would wait until next time and do all 4.

I was losing a bit of air out of one tyre, about 2 PSI a week and the tread depth was nearing the legal limit. When taking the tyre off, this is what we found on the INNER edge



Now the bloke who changed my tyres says that he has seen this time and time again on Goodyear and Dunlop runflat tyres. Is this something that anyone else here has found, or is he talking bollox and I have a serious alignment problem?

Edited by jonnie5 on Friday 4th May 12:14

[Andrew D]

I doubt it's down to the make of the tyre or that it's a runflat (although the latter could exacerbate the problem). The inner shoulders wear quickest on heavily cambered wheels anyway, was it the same on both tyres? The only strange thing is that the wear doesn't seem to be uniform around the circumference of the tyre. But I suppose if it'd been flat-spotted in one place then that would wear through quickest.

I had something very similar with some Pirelli's on my old Fiat; the driver's side front wore through to the radial on the inner shoulder over about 100 degrees of the circumference, but the tyre on the other end of the axle was fine. But once I'd swapped the tyre the problem didn't occur again. Which was strange.

[B'stard Child]

jonnie5 said:

I've had the rear tyres on my 535D changed this morning. I seriously considered changing all 4 for non-runflats but as I had so much wear left on the fronts I though I would wait until next time and do all 4.

I was losing a bit of air out of one tyre, about 2 PSI a week and the tread depth was nearing the legal limit. When taking the tyre off, this is what we found on the INNER edge



Now the bloke who changed my tyres says that he has seen this time and time again on Goodyear and Dunlop runflat tyres. Is this something that anyone else here has found, or is he talking bollox and I have a serious alignment problem?

Edited by jonnie5 on Friday 4th May 12:14

Looks like it's been run flat to me........................

Run flats are supposed to have air in em aren't they????

[jonnie5]

B'stard Child said:

Looks like it's been run flat to me........................

Run flats are supposed to have air in em aren't they????

Oh yes, and wheels I think

The lowest pressure it went down to was 31psi, when the system told me it had a puncture - it had 31psi instead of 38psi which is what I had 'set' the system at. (I personally think that 38 is too high, but the 'manual' says 2.8 bar which is just over 40!!).

Aaaaaanyway if it had this sort of damage from 'running flat', wouldn't I expect to see similar wear on the outer edge?

Andrew D - Thanks for your reply also, the other tyre was fine, and to my knowledge it's never had a flat-spot incident, although the camber could be the cause for the inner edge being worn. It was the tyre guys comments about runflats that surprised me...

Edited by jonnie5 on Friday 4th May 17:19

[tuffer]

I had a brand new Impreza that was worse than that after 2 weeks! Kept telling the garage that it felt wierd but they would not have it, turned out the tracking was WAY out. Lucky they did not let go at 150 Leptons on the A34
Just to get back on track, I now have a 330D M Sport and I can't see the tyres lasting long on it, tramlines and pulls like a pig. Michelin Pilots at the moment but open to recommendations for change.

[catherinej]

jonnie5 said:

B'stard Child said:

Looks like it's been run flat to me........................

Run flats are supposed to have air in em aren't they????

Oh yes, and wheels I think

The lowest pressure it went down to was 31psi, when the system told me it had a puncture - it had 31psi instead of 38psi which is what I had 'set' the system at. (I personally think that 38 is too high, but the 'manual' says 2.8 bar which is just over 40!!).

Aaaaaanyway if it had this sort of damage from 'running flat', wouldn't I expect to see similar wear on the outer edge?

Andrew D - Thanks for your reply also, the other tyre was fine, and to my knowledge it's never had a flat-spot incident, although the camber could be the cause for the inner edge being worn. It was the tyre guys comments about runflats that surprised me...

Edited by jonnie5 on Friday 4th May 17:19

Good grief that sounds way to high. Our X5 non runflat runs at 33 and im fairly certain our Z4 Coupe runflat tyres run at a similar pressure.

[Egbert Nobacon]

tuffer said:

I had a brand new Impreza that was worse than that after 2 weeks! Kept telling the garage that it felt wierd but they would not have it, turned out the tracking was WAY out. Lucky they did not let go at 150 Leptons on the A34
Just to get back on track, I now have a 330D M Sport and I can't see the tyres lasting long on it, tramlines and pulls like a pig. Michelin Pilots at the moment but open to recommendations for change.

My E39 Sport tramlined and pulled as above, but a laser four wheel alignment and new front tyres sorted it. The existing tyres were only 50% worn but had become "stepped" and uneven across the tread. Quite common on BMW's I hear.