I apologize for the delay. I have been out of town. The trailer that I am using for my 235 right now is made by American High Performance Aluminum Trailers in FL. The crossmembers are bolted across the bottoms of the frames for additional ground clearance as well as allowing the two torsion axle beams to be used as crossmembers and supports for the keel board. The trailer also has disc brakes on one axle. Their number is 1-877-582-2426.