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I have Sumitumo's and they definitely are stiff. But I also have FRPP suspension.
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__________________ 2014 Candy Blue Ford Focus Titanium
2006 Vista Blue Ford Mustang GT SOLD!
-Kenne Bell 2.6l Intercooled Supercharger
-Lowered on Ford Racing Suspension (Shocks, Springs, Front and Rear Anti-Roll Bars)
-Roush Lower Control Arms
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Ok, since I put the 18" rims and the Sumimotos on my car, the ride has REALLY gotten stiff. I can feel every single bump in the rode and it's a bit uncomfortable. Can someone tell me the best way to soften things up a bit? My *** will thank you...
I daily drove through 2 sets of Sumitomo's on my '02 GT convertible. I think the tires are just a lot more firm than others out there. Relative to some others out there the Sumitomo's are cheapest and that is probably why they ride harsh. Whether that be cheaper rubber, thinner plies, or the like I don't know. I bought them b/c of the price and for my use the stiffness didn't bother me.
Higher air pressure definitely changes the ride. Try to lower air pressure, but if that still doesn't help I think the best option is new tires from a different brand or maybe new shocks/struts.
2012 5.0... Born on April 2011
12.70 @ 114 mph
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