The specs just provide dry weight, you need to add the weight of the motor, batteries, fuel, water, provisions, the sprung weight of the trailer and other incidentals. Allow for an additional 400lbs. At 3,800lbs less the hitch weight each tire would need to support around 1,725 lbs. So get trailer type tires rated for around 2,000lbs. We trailer a similar 22' boat, a Starwind 223 and we trailer at close to 3800lbs. A water ballasted boat would trailer at a lower weight but if you have a swing, ballasted keel you will be close to the 3800 lbs.