2012 Jeep Grand Cherokee SRT8: Run Flats?
September 3, 2012
A few of us, including myself, have posted grips about the ride quility of our long-term Jeep Grand Cherokee SRT8. The high performance SUV is surely stiffly sprung and its ride is on the busy side. I wrote how I felt its suspension could be backed off by 10% without sacrificing enough agility to matter.
Now I'm rethinking that. I'm starting to think it's the Cherokee's run flat tires that are the culprit here and not its suspension. Run flats are to ride comfort as bad breath is to a love life. And any chassis engineer will tell you that run flats make their job much more difficult.
The big Pirelli P Zeros on our Jeep are sized 295/45-ZR20 and they are a max performance summer tire according to the www.tirerack.com. My theory was to be proven with a quick tire swap, but the only other tires Tire Rack offers in that size are an all-season Pirelli run flat and Pirelli's Scorpion Ice and Snow tire.
I kept shopping. Looks like Hankook and BFG are marketing products in that size, but they're also all-season tires, which means they both have a less aggressive compound and tread pattern than the Pirellis.
What do you think, should we mount a different set and see what happens?
Scott Oldham, Editor in Chief @ 9,022 miles