Just a thought on tires and cost to race...
Hand out-tires are a tech nightmare.
To win at all cost.
One thing you will never stop, is the amount of money that a person will spend to win. Given only 2 or 3 sets of tires for an event; one could get tires for practice somewhere else... get a racer to get all they are allowed and get the ones they do not use...I have seen racers at big events spend funds on batteries, motors, tires and ect. and then sleep in their cars and barrow money to eat.
Manufacture Reputation
If it is a concern that one manufacture may cheat. They would have a lot to lose. Looks like that a one manufacture deal is the only way to go but, a manufacture can not always keep a tire compound to the exact shore number. Racers have faced material change sending racers looking for date codes and the latest item. I have seen sponsored racers send wheels off to have a different compound foam mounted that no one could get. I guess the sam can happen with a spec tire.
What is the answer
In the end a spec tire rule may only help the local racer, the hobbiest, and Joe racer who just likes to attend big events. But, I still think it is a good way to help get more stability, keep the existing racers and help control some cost for existing and new racers
There is no perfect answer... only the lesser of the evils...No matter what is used a racer will adapt and race. I know I will.
Just my opinion
I could be wrong