The MF-813 Flying Mule of the Serenity.
The MF-813 Flying Mule, was a land based vehicle. They were capable of carrying up to 4 people plus cargo. Their main role was to transport cargo across medium sized distances. They had a top speed comparable to most other average landspeeders but the speed was relative to the cargo weight. Such vehicles were common additions to the compliment of Firefly-class mid-bulk transports. The vehicle was one of the many products of Blue Sun.