I got Nexen N'fera RU5 for my 2011 Infiniti FX35 AWD. The ride is so bumpy now. Steering wheel vibrates above 60 mph. The installer rebalanced them but I dont find much difference. I only got 70 miles on them so far. Do I have to wait for the break in period like 500 miles or just return them and get the Bridgestone Alenza plus or the OEM ones Bridgestone Alenza sport. This tire change has completely taken the fun out of driving.