Talk:Research & Development/BMW 3.0 CSL Hommage/@comment-37013439-20190325125736/@comment-37013439-20190325181930

YaXa33 you know that a certain number of tests have to be completed to unlock corresponding upgrade/PRO levels. I think level 5 of tires will be unlocked to upgrade after some tests in LAB 2 or LAB 3, not sure.