Humming Tires

Some times rear and front tires have different air pressure requirements. Check that first! For some reason, when my saturn dealership 'checks' my tires the OVER inflate my rear ones. Yeah, professionals. ;)

Also, I'm figuring that since you rotated the tires, you checked wear paterns and ruled out any serverely abnormal wear paterns(indicating bad alignments and damaged tires), so you might have some small abnormal wear paterns(like cupping wear from wrong air pressures). The point of rotating tires is to allow even wearing of the patern, so I would just give it time and let it get in the groove. Just monitor over time and see if it declines.

IMHO,

Tom @

Were they rotated across sides or were they kept on the same side and just F to R? Some sport tires require they be kept on the same side.

Bob

Were the tires cold when you checked the pressure? Are they a stock spec tire? When I put ContiExtremeContacts on our '96 SL2 the stock tire pressure settings weren't adequate. Way too soft at stock pressure.

Ken

back,there

backs?,a

paterns(indicating

monitor

Well I had my tires checked and they too were over inflated. This caused the center of the tire to wear more than the edges. When I fixed it(after driving on them for a while), they 'cupped' and I noticied a strange noise comming from them. Thought it was a bearing, and after some checking around, the mechanics said the 'cupped' tires will make noise till they wear down even. I watched the pressures and rotated the tiries, and all is find now.

Ok, if you don't think it's the tires, then a good guess could have you leaning towards alignment or bearing issues. I would jack the car and rule out bearing and rubbing components, but that's me. So, you have to make the guess now.

Sorry couldn't help futher,

tom @

Wow saw this post and I completely forgot. Check for direction marks on the tires.

Good job Bob!

later,

tom

They're probably humming because they don't know the words!

Either that or they're off of a hummer