To be clear, because I am unsure if I was, I was agreeing with the general view expressed that stock tires (and the extra power this would allow) would work for this weeks Trial, I chose what I chose as I had it on hand, and admit, while it can be okay, it is on the slow end.
Re: passing on corners, it is a only if can be done situation. Straights are clearly better for passing when the opportunity is there.
At the start of a race, where there is a close, know ‘jam’ corner, I if at the front will try to go for getting in front of the A.I., if at the back or middle, will actively hold back and go for best that is possible at the time.
In race, if A.I., will use what I know about how they will handle a corner to pass, or at least use to my advantage, and be a little aggressive if needed.
Against players, will only pass when it is clear there will be little or no interference - players who corner badly (wall slam, or ride) are easy to pass, and easy to now after once or twice if not already passed, better drivers I will generally actively hold back, to the point of it been unhelpful to me, and if they are behind me will make it as clear as possible they should pass if faster. If I am constantly close behind another player, and faster, I would hope they will make so a pass is easy, if they do not I will try when can, and hope for the best, again trying to not cause them issue - yet, it is clear when someone is close behind you, and faster, moving aside is not difficult.