Hello together, wanted to change yesterday to my summer tyres (Pirelli Pzero 225/35 R 19 XL). I noticed that there was a small screw in the tyre profile (see marking in the picture) (7 mm). At this point the tyre still has about 4mm profile. I pulled it out and there was no air. Nevertheless, I think about whether the tyre can be mounted without problems. How thick is the layer under the “rain channel” approx.? How is your opinion? Thank you! MfG dimitri