I’m in the process of building a new Lariat super crew long bed with 502a, max tow and fx-4 plus a few other options. The max tow jumps from 18” to 20” wheels and tires. However, the spare remains an 18” tire and wheel. Several dealers have yet to explain why or offer a solution. In the event of a flat tire, it would seem unsafe at worst and unwise at best to cruise down the road with an unmatched tire/wheel arrangement. To do so while towing a camper sounds like a disaster in the making. Anyone else find this issue or better yet solve it?