Allow me to be the first not to answer your question...
How much does your bike weigh? If you can't find what you're looking for, have you considered one of those racks that mounts to the trailer hitch? They're rated for 500 pounds. You didn't seem to say it HAD to be enclosed, so this might be an option if that's not critical.
How much does your bike weigh? If you can't find what you're looking for, have you considered one of those racks that mounts to the trailer hitch? They're rated for 500 pounds. You didn't seem to say it HAD to be enclosed, so this might be an option if that's not critical.