Hi Greg,
I have a single axle, 6 1/2 ft wide by 10 ft long trailer with a very similar full width tailgate/ramp on the rear. It has has 15 inch tires, but a 2500 lb axle. I have had this trailer for 25 years for hauling primarily lawn mowers, but also ATVs, motorcycles, and yes, one of my Spyders.
I have had the 2009 Spyder GS on the trailer numerous times.
As mentioned above, the is a VERY good possibility it will drag, either at the nose when going up the ramp, or, equally possible, in the middle as the Spyder goes over the transitions between the ramp and the floor of the trailer.
First thing to do is to take advantage of the level of the terrain you are loading on. Try to get the end of the ramp on higher ground to minimize the angle of approach and also the chance of the middle of the undercarriage dragging as it crosses onto the deck from the ramp.
I have done two other things to allow loading the 2009 Spyder without dragging.
1.) Place a 2x6 of 2x8 across the full width of the ramp to raise the ramp to lessen the angle. You may need to run two 2x6 pieces out a foot or so to get the front wheels up to minimize the nose dragging as it approaches the ramp
2.) Use the tongue jack on the trailer, while attached to the towing vehicle, to lift the front of the tongue, with a net effect of minimizing the Spyder to drag in the middle as it crosses from the ramp to floor of the trailer. With a light towing vehicle like my Ford Ranger, this is easy to pick up the tongue several inches while attached. Would not be as easy on a large, heavy towing vehicle.
A longer tailgate/ramp would also minimize the approach angle and lessen the chance of dragging the nose or the undercarriage...but the wind resistance to pull this type of tailgate is very significant. These small trailers with the big drive on ramp/tailgates pull hard going downhill with the tailgate up. With the tailgate removed, you don't even know its back there!
In any case, without taking at some of these steps, you will either hit the nose on the ramp during approach and also likely drag the middle as you crossover from the ramp to the trailer floor. This applies to my trailer, but other than being 1 foot narrower, the one you have pictured will likely do the same.f The extra foot of width at 6 1/2 ft gives plenty of room on each side and also better strap down options. I have a 2x6 bolted down to the floor of the trailer as a stop for the front wheels and then use four HD ratchet straps to secure it. If I was dedicating a trailer to the Spyder, I would look for a set of chocks to secure the front wheels, which would be easier and safer, but my trailer is primarily for other duty.