Express Custom Trailers MFG. Smart Car Trailer is designed for a Smart Car or a Fiat, or of similar size. This trailer is also great for the Side By Side. this trailer is build to safely get your car or toy to where ever it needs to go. 2 x 2000lbs leaf spring suspension. Loading ramps mount flat on deck Radial tires LED Lights, 2" ball. Up grade from 13" radials to 14" radials for $120.00 Add a spare tire and mount $250.00 Rear Stabilizer Jacks $150.00/pr installed. Want brakes and up GVW. to 4000lbs. $990.00 2 YEAR WARRANTY.