carcus

Set of 20 inch rims, only 10,400 miles on the Max. Rotated the rears to the front. Front were seeing a bit of wear, rears are fine. I can kind of hear a bit of humming or pulse humming at speeds under 20 mph. This is in the gas pedal and not the brake pedal. Any ideas on what it might be. At speed it is fine. Leaving for Iceland in 3 weeks for a year so got a fresh Royal Purple 5W30 oil change, fresh air filter and rotated the tires.....just wondering what this might be. Any suggestions would help. Maybe it is just the difference in having better tread on the front now than before after the rotation. When I rotated the rears to the front, did not get them rebalanced as the weights were still there.

Thanks all.

msoemax

RFB the tires. The slightest change in balance makes a huge difference. It may also be the tread. Measure the tread depth if you can between the front tires and the back ones. Anything over 1/16 in change can result in a different sound/feel.

carcus

There is a big difference in the outer tread of the front tires now on the back. Outer wear on the old front tires rotated to the rear now is due to it being FWD and the turning wears the fronts out faster. There is more than 1/16th tread wear difference. Do I need a rebalance? Could that solve the issue?