Rail freight paired with autonomous last-mile(s) robo-delivery ? If the bots are small enough, their tires contribute effectively zilch, yes ? Because tire wear

Rail freight paired with autonomous last-mile(s) robo-delivery ? If the bots are small enough, their tires contribute effectively zilch, yes ? Because tire wear is an exponential power of load ? "Small" loads would be luggage, boxes (up to white goods), bodega resupply, single large pieces of furniture, cases of beer.