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Discussion Starter · #1 ·
on the current IS "F" Bridgestone Potenza RE050A. I noticed the side wall sticks out, the rubber part act as a guard against curbage. I also notice the higher end Porsche 911 has it too. Is that a style, because some RE050A does not have that. Can someone explain this.

Two very different sidewall.

255/35/19R 96Y RE050A

255/35/19ZR 96Y RE050A

Both have same heat and wear ratings.
They both look identical but without the side wall protector against curbage.
 
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