annoying vibrations

richiebklyn

Hi guys, I am hoping someone with experience can tell me what to do next. I developed a bulge/bubble on my front passenger tire about a month ago. I have a 2015 mercedes benz cla, I do not have run flats. I bought 2 new front tires (Nankang NS-20 Performance Radial Tire - 225/40R18 92H) and had them replaced and balanced at pep boys. My original tires were pirrelli, same size, and the 2 originals are sill on the back of the car.

After installing the new tires on the front, The tire tech told me I have a small bend in my rim and that may have caused the tire bulge. I could see how this might have happened, because I hit a small pole laying across the road a few months back, but never had any vibrations.

After having the new tires installed, I took the car on the highway a few days later and noticed a vibration at high speeds, 60 mph +. The steering wheel gas pedal and even inside door and seat vibrate. I can feel the vibration in the steering wheel only at lower speeds 35 mph, only if I squeeze the wheel tight.

I took the car in to have the bent rim fixed, but a week later I still had the vibrations. I went back to pep boys and they explained I had a small bend in the drivers side rim as well. They also explained that the tires needed to be rebalanced. They insisted that when I had the rim fixed it was not rebalanced. So I balanced all 4 this time and had a full alignment.

Considering I still had the vibration I had the drivers side rim fixed the following week, as well. At this time I still have the vibration in all areas I mentioned. Should I go back to pep boys or maybe my regular car mechanic to see if it is not related to tires and rims. Should I go to mercedes if it is not the tires? Please let me know what else should be checked. Considering I never noticed the vibration before the new tires, can one of the new tires be bad? I would expect pep boys to tell me that though. Thank you for your time.

Rich