Since there is the biggest rover and rover, why do not you add a glider machine that can fly?
It is an amazing idea, as it may be possible to explore the planet (not very wide) with this machine, so you can also see resources as far as the eye can see!
Obviously this "glider" will be done with resources a little rare! 2 of resin, 1 of titanium and 1 of coal, so it will last a little longer!