As a jumpstart, the Lunar Rover had four 1/4 HP motors for a total of 1 HP. The average recreational rider puts out .35 HP over a two hour ride. It weighed 460 lbs on Earth, and could carry a payload of 1,080 Earth lbs. Tires will be an issue since the temperature can reach 260 F on the surface, and much colder if you happened to go through a shady section. Assuming a flat area, shade won't be an issue. Of course that is just the surface, the vacuum above will be much colder.
Oh, and the dust is very abrasive. I suggest waxing the chain...