When I did my 747 classic course in a previous century I was taught that the typical weight on the 747 nosewheels was between 5 and 12 tonnes. When the 747-400 came out they had considered moving it to have a bit more weight on it but that would have made it a new aircraft design and certification would have taken for ever.
So here's a question for you. if the designers wanted more weight on the nosewheel would they move it backwards or forwards? A lot of people think the answer is forwards....