adjustable air springs

[jgretz13]

i am planning on using a double dirtbike carrier that attaches into the trailer hitch on my 92 stock bronco. each bike weighs about 230 pounds and the carrier itself weighs around 50. i put it in with one bike on and saw a lot of sag. i am debating whether to use add a leafs with stiffer shocks, or to just use adjustable air springs in the rear to counteract the sag and keep the carrier from scraping the ground.

anyone have experience with this?

thanks