You can absolutely use the Equal-i-zer # EQ37100ET without the spring bars installed. It'll be just like towing with a standard ball mount, no different.
The # EQ37100ET is rated for trailers with fully loaded and ready to tow tongue weights ranging from 600-1000 lbs (this figure should also include anything stowed in the bed or cargo area of the tow vehicle behind its rear axle).
The system includes the 2-5/16 inch trailer ball, but you'll need a 1-7/8 inch thin walled socket to install... view full answer...