New Shoes
 

An experiment with Michelin Pilot Sport AS-3 245/40-R18's to replace to stock run-flats which are no longer useful in the wet (actually they never were). Diameter is almost identical to the stock 225/45 R18's. About 1 inch wider than stock size.

http://photoshare.shaw.ca/image/5/b/...2131_xga-0.jpg

http://photoshare.shaw.ca/image/5/b/...2_v2_xga-0.jpg

The AS-3's are a little noisier (tread whine) but ride and traction is infinitely better. Less road noise transmitted through the suspension than run-flats. They seem to do well on frosty roads so the rubber must be a softer compound. Car feels like a go cart in turns. Tread pattern almost reminds me of Michelin LTX SUV tires.

Caution: You'll want an experienced tire tech to do the mounting, which would likely defeat the average Bubba.

So far an excellent choice.

Nice, keep us updated on your test results!

"Stock run-flats"??

Didn't know the SS came with those.

donbrew. They don't.
One of the OP's other posts says he took the run flats off of a Mini Cooper S before getting rid of it.

I wonder what "stock" means?

:lol: Well, they were "stock" from the factory on a Mini S. My wife had a 2002 Mini S with the run-flats. Plus, with the run-flats, the Mini S had no spare or jack !

The "run-flats" were imaginary...

I had always assumed the stock Michelins were run-flats, what with the TPMS system and no obvious spare tire. I saw "TPC" on the sidewall without bothering to investigate what it meant. And the tires rode like run flats i.e. stiff sidewalls and lots of road noise transmitted through the suspension. So when I stole my Pirelli snow tires (not run flats) from the outgoing 2006 John Cooper Works S car, I purchased a Madza mobile kit (compressor and latex compound) to provide some level of backup in case of a flat.

After I reviewed the comments regarding run-flats my New Shoes post it started me thinking...I could not find anything documenting Michelin run-flats as standard equipment on the SS. And it turns out Michelin run-flats always have a ZP designation (zero pressure) on the sidewall, and this was not to be found on my old tires. So today I finally tore the trunk apart and discovered the compartment containing a spare tire etc. Wonders will never cease.

My apologies for the confusion.

Jacob

Need a Owners Manual? https://www.chevyhhr.net/forums/gene...s-manual-3074/

Why thank you. But I would need to read it to be helpful.:bow:

And I get told to adjust my meds!?? Seriously, Glad you found your spare!!