Tyres Out of Shape

[speedwaydthom]

Took my Avensis Tourer into Tyre Spot on Saturday to have a puncture repaired on rear N/S wheel. Tyres are about a year old (Goodyear brand) fitted by Costco last October and wheel alignments checked and adjusted by Toyota dealer several days later. I was surprised to receive a report from Tyre Spot fitters that both rear wheel tyres were "out of shape". Not fully understanding what this meant or whether it was a safety issue, I asked Costco to check this out and provide a bit more detail. They very kindly obliged by putting the car up on the ramps and pointed out on both tyres where there was slightly more wear on the outer shoulders of each tyre. They suggested it wasn't a safety issue, but if both tyres were put on the front of the vehicle, there would very definitely be a potential tyre noise issue. They suggested also it could be down to a geometry issue or worn shockers or wrongly inflated tyre pressures.

I keep a regular check on tyre pressures so am at a bit of a loss as to what to do next, if anything.

Just wondered if anyone else has had this issue and if so, what the outcome was?

[ighaig]

I have experienced this twice.  I am told its caused by internal failure of the internal reinforcing belting.  Can be the result of a manufacturing defect or kerb damage.  I suggest you ask Costco to fit a new tyre and offer to pay but insist they send the defective tyre back to the manufacturer for assessment and insist they show you the report afterwards.