In the beginning, racers turned up at the racetrack on motorcycles with race tires already fitted. Later they turned up with spare tires, which they fitted themselves. Years went by, and everything was fine. Tires were rock hard and had no grip, but the entire paddock was in the same boat. Everybody was happy.
Then one day a tire company turned up with a small van, a tire-mounting bench or barrel, some levers, and some tires to sell.
Then another tire van turned up, fitting and selling another brand. Then the other company came along with a better van and technical service. And then the fun began.
The vans got bigger and transformed into trucks. Then the number of trucks became more numerous. Armies of technicians arrived. Tire companies spent lavishly to supply special tires to very special riders.
Then series promoters realized, "These guys have money!"
And thus it will never go back to tire companies competing against each other. Money is to be made by the series promoters in "commercial fees," and the tire men can make money by selling tires-at least some of them-instead of competing with other brands to make money.