sedona 2006 Front Tyres

I have a problem with the front tyres of the vehicle in that after 7000 miles of normal motoring the front tyres have worn both on the inside and outside edge . Kia said it is not their problem and to approach the tyre company. Bridgestone have said there is no problem with the tyre it is the vehicle . Has anyone had a similar problem ...Help

I have a problem with the front tyres of the vehicle in that after 7000 miles of normal motoring the front tyres have worn both on the inside and outside edge . Kia said it is not their problem and to approach the tyre company. Bridgestone have said there is no problem with the tyre it is the vehicle . Has anyone had a similar problem ...Help

You are wearing out your tires due to low tire psi. this is your responsibility as the operator of the vehicle.

Also I recommend rotating the tires every 6000 miles to maximize tire life.