Originally Posted by srd5948
Thank you all for the input. I will consider all the above information before changing the tires.
Since you have the ZSP, 30k miles is quite a bit of milege on the OEM tires as most folks seem to get only about 15 to 25k, especially on the rears. So I strongly suggest you purchase a tread depth gauge and measure each tire yourself at a number of different spots. Legally, you need to replace them when below 2/32" (wear bars), but you will be much safer replacing them at 3 or even 4/32".