While vacationing in Portugal in the '70's, Mr. Dal Allison of Systems Sports Inc. met an older gentleman who was hand-building and selling a collapsible tent designed to mount on an automobile's roof rack; and during this same time period, Trailmaster Inc. was manufacturing and marketing it's first motorcycle trailer on a national basis. 

In the early '80's, Gary Cooper of Trailmaster met Allison and began assisting him in marketing his new product idea that he brought back from Portugal - Dal named it the "Topbunk", but after nearly two years of sales efforts, it became apparent that the camping public in the U.S. just wasn't ready to accept the concept of climbing to their auto's roof for a night's sleep.

• RTM Fiberglass Body (Resin Transfer Molding) for the ultimate in strength, precision tolerances and surface finish - both inside and out. And, hand lay-up, chopped fiberglass.
• Enlarged Front Living Room-- nearly 6 ft. sq. with 'pan-rolled' floor (all seams turned 3" up off the wet ground!)
• Basement Level added to cargo body (utilizing space between main frame & highway).
• Larger Screened Windows for maximum 'breeze-flow!' Dual-zipped with single piece 'V-Peak' design for the most versatile use.

• Window Canopies created for all sides (no ground stakes or guidelines required).
• Forward vertical wall incorporates 2"(w) x 6'(h) runner strips along outward vertical seams for a precision fit of the (optional) 81 sq. ft. Clubhouse.
• 81 sq. ft. Add-A-Room developed in 'square' format for the most effective use of interior ground space.
• Spring-Loaded Rear Roof Bow for proper water shed over rear zippered window (kicks back wall on 'outward' pitch).
• New screen room and smaller Add-A-Room.

• Telescopic 'Bed-To-Ground' Supports to maintain level sleeping surface.
• Straight-Line Main Frame for maximum strength (no cuts or 'steps' in tongue).
• All telescopic tent bows located INSIDE the tent for ease of one person set-up, and superior performance in strong side winds.
• Internal aluminum 'arched' roof struts that simply 'snap' into place-- which joins all tent bows into a 'rigid' frame construction.
• 12" wheels, impressive 9" turn signals, 2-way locking cargo bay and suspension upgrade (to accept electric brakes) ...all stock features - just to name a few!