2027 Grand Design Momentum MAV28MAV

The 28MAV is where the MAV roster ends: thirty-three feet eleven inches, sleeping six, and the only MAV of the five that Grand Design gives a slide-out. It keeps the MAV build — the 24-inch DoveTail loading ramp, the garage pull-down screen, no wheel wells in the garage, R-9 walls, an R-40 TPO roof with a limited lifetime warranty and a heated enclosed underbelly with suspended tanks — and adds an on-demand water heater. At $60,211 it is the most expensive MAV and still twelve thousand dollars under the entry G-Class trailer.

The trade against the rest of the roster is payload. Grand Design publishes 11,000 pounds of GVWR against 8,300 dry, leaving 2,700 pounds — the tightest in the MAV range and well under half the 17MAV's 4,408, on a trailer that is eleven feet longer. The garage is also the shortest of the five at ten feet four inches. What you buy here is living space and sleeping capacity, not cargo capacity. The 1,200-pound dry tongue is the highest in the roster. And as with every MAV, there is no fuel station: the field is published as N/A and no fuel figure appears on this page.

Momentum is Grand Design's toy-hauler family, and it spans four rosters across both tow types. The full-size Momentum fifth wheel is the flagship — a 101-inch wide-body coach on MORryde independent suspension with disc brakes, carrying a 60-gallon dual fuel station. The Momentum G-Class fifth wheel sits below it on MORryde CRE3000 suspension and a Rotoflex pin box with a 30-gallon fuel station, and the G-Class travel trailer puts that same garage behind a bumper pull. The Momentum MAV is the compact end — the lightest and cheapest way into a Momentum garage, and the one roster with no fuel station at all. The 28MAV on this page is highlighted; each other profiled plan links to its own page. The full MY2027 catalogue runs to 28 floorplans across the four rosters; eight are profiled in depth here and the rest are catalogued on the line hub with their weights.

This floorplan carries its water comfortably. A full 90-gallon fresh tank is roughly 28% of the 2,700-pound cargo capacity, leaving the 28MAV with a usable gear budget even when you tow full.

The published dry tongue weight of 1,200 pounds is 14% of the 8,300-pound dry weight, which sits inside the 10–15% band usually quoted for stable towing. It is still a dry figure: loading the front pass-through and the fresh tank both push it up.

Nothing above changes the ceiling. Loaded to its 11,000-pound GVWR the 28MAV is towing 2,700 pounds more than its 8,300-pound dry figure, and that is the number your vehicle has to be rated for — not the brochure weight.

Tank balance is generous here: 90 gallons of fresh against 74 grey and 37 black, so waste capacity keeps pace with supply and the fresh tank is the constraint that ends a dry stay.

Ranked by GVWR, the 28MAV sits 3 of 8 in the Momentum line: 11,000 pounds against a line that runs from 9,950 to 23,500 pounds. That position is the useful thing to know, because the plans immediately either side of it are the real alternatives.

Either side of it in the same line: Momentum 21G matches it exactly at 11,000 lb GVWR; and Momentum 30G is 2,000 pounds heavier at 13,000 lb GVWR.

1 other Momentum plan shares this floorplan’s 11,000 lb GVWR, so the ranking above separates plans that tow to the same ceiling. On a shared chassis the figure that actually differs between them is cargo capacity and where the weight sits, not the rating.

Against the 28MAV: the Outback 340BH is 5 ft longer and sleeps 4 more; the Voyage 3235FK is 1 ft longer and sleeps 1 fewer; the Coachmen Catalina 313RLTS is 1 lb lighter and 2 ft longer and sleeps 2 fewer. Those are differences in the published numbers only — what they cost, how they are built and how they live are separate questions each of those pages answers on its own terms.

Those are the nearest travel trailers from other lines by weight — one per line, picked by proximity on that figure and nothing else. They are listed so the same tow vehicle can be checked against real alternatives, not because they are equivalent inside; layout, build and price diverge sharply across that group.

For scale, the Momentum floorplans profiled here run 5,542 to 18,114 pounds dry and 23 to 46 feet of exterior length across 8 plans. Where a floorplan falls in that spread usually says more about which vehicle can tow it, and which site it fits, than the layout name does.

Every profiled floorplan in this line, with the full weight table, is on the Momentum line hub.

This catalog tracks 18 specification fields per floorplan. Named sources publish 16 of them for the 28MAV. The rest are not shown, because the alternative is reading a figure across from a sibling floorplan or from what the segment usually does — and a number nobody published is worth less than an admitted gap.

Not published for this floorplan: axle count, tire specification. If you find one of these in a manufacturer document for this plan, it belongs on this page.

The completeness figure at the foot of this page (97%) measures the same thing on the full field set: it is a measurement of how much this floorplan’s manufacturer publishes, not of how much research went into the page.

Values on this page carrying an asterisk were derived by arithmetic from published figures, or come from a single source, rather than being printed directly by the manufacturer. The flag travels with the number into the downloadable spec sheet.

How every figure here was sourced and checked is set out on the methodology page.