Tire "cupping"?

[eberhartmark]

I have a P85. I was hearing excessive noise from the front end between 15-30 MPH. Took it to service and they felt the tires and said they were "cupping". Basically, the tires felt like little waves on the inside. The tread was still good (6 out of 10 on their scale). The front tires were moved from the back when we put new tires on a month ago. Has anyone else experienced this issue? I'm afraid that just putting new tires on will only act as a band-aid and I'll have to put new tires on every 6 months! I'd rather know what is causing the tires to do this. Weird that it's on both of them.

 

[Drewflux]

Cupping is normally caused by an issue in the suspension i.e springs/shocks under performing, allow the tyre to skip on the road surface.

However that being said cupping is often miss-diagnosed. Most often is an alignment issue. As your have been rotated from the rear, i would suggest the tyre have wear from excessive negative camber and/or toe in.

I would start with an alignment check before anyrhing else

 

[eberhartmark]

That makes a lot of sense! They did do an alignment when they rotated but we never discussed a shock issue. Thank you for your reply!

 

[eberhartmark]

Boy do I feel stupid! I have air suspension! So since they just did an alignment, is there anything else that could cause it?

 

[whitex]

If they did an alignment, ask for the alignment report and see whether before it was off in a way that could suggest the uneven wear.