To stop the side walls from flexing so much just run them at a higher air pressure.
I think mine are at 40psi. could be 37, I'll have to check some day and see what the side wall looks like at the different pressures.
One day back in early Dec while on a chair lift and ski buddy said the new snowtires and his Audi S7 felt like the sidewall flexed to much. I told him the increase the air pressure by 5psi. Next weekend he said that worked great.
rob-2, I also like the DWS's so I don't have to run the snows to long. Took the snows off the wagon last week.
178,000+ miles, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
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