Designing a Versatile Fixed Keel Sailboat Trailer

This is a design overview and specifications breakdown of a custom, versatile tandem-axle trailer for transporting your own fixed-keel sailboat in the 26 to 32-foot range (such as the Pearson Triton, Alberg 30, or Cape Dory). Rather than a fabrication or welding tutorial, this video focuses on the structural dimensions, design logic, and the telescoping riser support system that allows a single trailer to safely match and adjust to different hull contours. The info in this video will assist you in ordering a similar trailer with correct specifications or can be a starting guide for building your own trailer. Below are the general specs for the trailer: 1. Lift-off type, tandem 7,000lb drop axles, both with electric brakes. 2. 14,000 GVWR construction, 7" channel, 2 5/16" ball. (You might notice the tag on the trailer states 12,500 lbs. We derated it so as not exceed the weight I’ll be using with my Class 5 ball-type hitch, and to stay within private-use registration tiers. Consider it a built-in safety factor.) 3. 7,000lb fixed tongue jack welded to frame (not the lighter swivel type). 4. Extendable nesting hull support channels and screwpads on threaded rods with 6 side supports placed outboard as far as possible (see sketch): Single bow center riser 26" long overall, 74 degrees. V screwpad at bow on sliding base held by U-bolts with extending riser channel. Two forward side supports risers 28" overall, 82 degrees. Two center side risers 28" overall, 90 degrees. Two aft side support risers 34" overall, 82 degrees. 5. Main 7” U-channel frames to continue forward within 8” of tongue for best support. 6. ST235/80R16 Range E tires or equivalent with spare tire. 7. Primer and black paint. 8. All galvanized fasteners. 9. LED lights. 10. Treated wood for screw pads and bed. I’ve included a sketch in the video to give you a clear sense of the dimensions and layout. Subscribe to get notified when the next video comes out: “Towing a Fixed Keel Sailboat: Trailer Setup and Transport Tips,” where I cover setting up the trailer for different boats and some tips on trailering short or long distance. Let me know in the comments if you have any questions. If you want a PDF of the dimensioned sketch and notes, contact me by email through AtomVoyages.com.