With my limited experience in dealing with Product Name Licensing for over 15-20 years, I'm pretty certain most, (not necessarily-all), Product Name Licensing Contracts are based on a usage fee for each individual product, (AMT Peterbilt Wrecker kit), being produced/manufactured that would use that product name, (Firestone or Goodyear), within the product/kit's contents. Each kit pays its own licensing fee based on that particular kit's production-run, (how many kits are being manufactured), and wholesale distribution, (just sold in the USA, or also sold in some international markets).
Now, I suspect that Coca-Cola gave AMT/Round-2 a "deal" on the licensing fees if they used that Coca-Cola logo artwork on more kits. "Go ahead, AMT/Round-2, produce one kit in 2019 with our Coca-Cola logo artwork on the decal sheet and the licensing fee will be $1.00/per kit produced, (completely made-up $ amount here for example-purposes only). OR, go ahead and put our Coca-Cola logo artwork on 5 different kits that you will produce in 2019, and that $1.00/per kit cost will go down to $0.85/per kit... OR go ahead and put our Coca-Cola logo artwork on 10 different kits that you will produce in 2019, and that $1.00/per kit cost will go down to $0.65/per kit."
Same logic would apply to tire brand names as well.