I swapped car with my daughter to put new winter tires on...

I swapped car with my daughter to put new winter tires on hers (I always use steel spiked winter tires here in Sweden). It is a 2011- Seat Leon with 155 000 km on the odometer (about 9700 sm).The tires, Good Year Ultra Grip, I put...

I swapped car with my daughter to put new winter tires on hers (I always use steel spiked winter tires here in Sweden). It is a 2011- Seat Leon with 155 000 km on the odometer (about 9700 sm).The tires, Good Year Ultra Grip, I put on have in reviews received good grades on noise, but I feel that I hear a rumbling noise that I do not recognize even though these types of tires always produce more noise than summer tires which it had when I last drove it.Putting my finger on the wheel hubs outside of the brake disks, the left hub is lukewarm but the right one is cold, this after an hour drive on the motorway in -7 degrees C.I just replaced the rear wheelbearings on my Volvo V70, but it had more than twice the distance on the odo. That hub was hot after driving it and some noise.On the V70 my reasoning was that if one was warn out, the other one would not last much longer so I changed the both of them.Can I be sure that this really is a faultering bearing on the Seat? In that case chances are that it is a premature failure or? and in that case I need to change only the left one?I do all this myself in my garage, therefor I don´t want to go to the dealership to pay for the diagnosis and then decline having them do the job.How can I be sure I take the right decision? Mechanic's Assistant: How old are the tires? And have they been a problem in the past? The rear tires are brand new spiked Good Year Ultra Grip Mechanic's Assistant: Are you fixing your SM yourself? What have you tried so far? I just took over the car from my daughte and have not driven it for a good while, and last time it had summer tires Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you? No, I was given this website from a friend in another issue, but what is the idea with your webpage? How do you make ends meet? Where and how do I pay for your service?