How to determine tyre wear for custom races?

73
United States
United States
I have been trying to setup a custom race so that racing hard tyres go red half way through the race requiring at least one tyre change. But I'm not quite sure how to estimate the right tyre wear setting, other than doing the race multiple times. For fuel consumption there is a setting in time trial which you can use to test via the number of laps remaining. Is there any good way to determine a similar estimate for tyres?
 
Yeah that's unfortunate, what I've ended up doing is taking the car into a time trial on the relevant track and set the tyre wear to maximum (50), then did a few test laps noting the visual percentage of red that increased on the gauge. With some simple maths I'll then work out the wear per lap and change the wear amount based on after how many laps I want the red to be 100%. This of course assumes tyre wear is consistent each lap :D
 
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