I rented a Ford Focus for 22 days pick up Heathrow drop of Stanstead. I drove 1350 miles mostly on motorways . On dropping of the car, the attendant walked around the car and then got down on his haunches and made a detailed inspection of both front tyres and reported to me that both tyres had damaged side walls. I stated to him that I had not hit anything during my rental and that the damage sheet given to me on pickup showed that all wheels had been damaged.. I wrote a report and signed it. The tyres were also old and the car had done 38, 000 miles.
On my return to Australia I received a receipt showing that I had been charged for 2 new tyres totalling 204 GBP. I have corresponded with hert now for more than a month and basically had no response other than their standard " customer service" report. It seems that their approach is leave it for long enough and the customer will give up!!
I have spoken to a professional tyre repairer in Australia and they consider it unlikely that both front tyres could be damaged without the rear tyres also being affected. The Tyre invoice sent to me by Hertz states that the front tyres tread depth was 4mm and the rear tyres were 8mm!