I was hotlapping with Z4 GT3 on Imola, my good laps reached mid 1:46 with my best lap clocking 1:46.1 . After quitting track and changing "Tyre wear" to x1 within couple laps I made lap below 1:44. Both laps were made with same setup. To make sure that I'm not mistaken I restarted PC and made laps with tyre wear on and off. I got same results. Disabling tyre wear made car a lot slower. With default wear I could feel how grip increases along first lap, this was simply missing without wear. Of course I may be mistaken and missing something obvious. So it would be nice is someone could test it on their machine. But still I have sneaking suspicion that if I post it on support forum I will get "As designed" tag.