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.

A full 90-gallon fresh tank is about 751 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 28% of the 28MAV’s 2,700 lb cargo capacity, leaving 1,949 lb (325 lb per rated berth). Across 4 Momentum travel-trailer floorplans the water share runs 17% to 28%, and this plan’s is the highest. Nearest on that share: Momentum 21G at 20%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).

Closest sibling: the Momentum 21G, nearest on the published figures. It differs on 5 of the 9 fields both publish (this plan first): length 33 ft 11 in vs 26 ft 11 in; dry weight 8,300 lb vs 7,280 lb; cargo capacity 2,700 lb vs 3,720 lb; dry hitch weight 1,200 lb vs 1,056 lb; black tank 37 gal vs 39 gal. They match on sleeps, GVWR, fresh tank and grey tank.

Either side of it by GVWR: Momentum 21G matches it at 11,000 lb GVWR; Momentum 30G is 2,000 lb heavier (13,000 lb GVWR).

All 8 Momentum floorplans: Momentum line hub.

Against the 28MAV: the Eagle 320FBOK is 4 ft longer; the Outback 340BH is 5 ft longer and sleeps 4 more; the Pause 22.4 is 7 ft shorter.

16 of the 18 fields this catalogue tracks are published for the 28MAV. Not published: axle count, tire specification.

Values marked with an asterisk are arithmetic on published figures or come from a single source; the flag travels into the downloadable spec sheet.

Sourcing rules: methodology.