C7HOORAY

Here's my non-runflat true story....on my C7 I carry a continental slime/inflator incase of a flat....got a flat at church last year...noticed it was losing air when I pulled into the parking lot...came out an hour later to find the tire was COMPLETELY deflated - whipped out the Continental inflator and watched while tho whole contents of pressured air and sealant went int the tire. DID NOT INFLATE THE TIRE ONE INCH! Drove to Discount Tire where they had installed the Michelin Pilot Sports....the rim seal had failed due to chunks out of the bead incurred during the install of the tire. They said I had ruined the tire from driving on it while deflated. (I knew I had) I said, "Check your records...YOU were the last to mount that tire." I drove out of there with my new free Michelin!

I just bought a '19 C7 with factory Run-Flats and immediately pulled them off and installed all-season Michelins. Quieter.

Anybody want to buy my almost brand new run flats? I have them for sale.

Oh4GTO

I just went from Alpin PA4 to A/S3+ ZP and boy what a difference. The stiffness and noise is greatly increased going to the ZP. The ZPs have this thud whenever hitting a bump whereas the PA4s were quite. The ZPs are definitely at least twice as stiff. Both sets were brand new and driven in the same temps on the same roads.

yaknuts81

This is exactly what happened to me too. Started getting a leak in my rear passenger tire -- 30 psi down to 25 after a day. I could refill with air and it would do the same the next day. Some days (seemed to be warmer days), I didn't lose any air. Others, I'm down to 16 psi by the end of the day. Cracked rim -- I saw at least two cracks. After GM rejected a warranty repair, I have a set of forged wheels on order and should have them next week.