01 What Momentum is
Momentum is Grand Design's toy hauler, and it is not one line but four. Grand Design — based in Middlebury, Indiana and a Winnebago Industries company since 2016 — publishes the flagship Momentum fifth wheel, the Momentum G-Class in both fifth-wheel and travel-trailer form, and the compact Momentum MAV travel trailer, as four separate rosters that share no floorplan codes. Together they span 28 MY2027 floorplans, from a $47,462 single-bedroom MAV to a $190,338 nine-berth flagship. This hub carries all 28.
The rosters are genuinely different machines. The flagship Momentum rides a 101-inch wide-body Super Chassis with drop-frame storage inside a five-side aluminum cage, on MORryde Independent Suspension 2.0 with disc brakes and six-point hydraulic leveling, with a 60-gallon dual fuel station, a 20-cubic-foot refrigerator and 140 gallons of fresh water. The G-Class fifth wheel keeps the wide body and Grand Design's new Omega Frame but moves to MORryde CRE3000 suspension, a Rotoflex pin box and electric auto-leveling, with a 30-gallon station — and lists roughly forty thousand dollars under the flagship. The G-Class travel trailer brings that garage to a bumper pull, with laminated aluminum walls, a full-sized rear ramp door and a flat, wheel-well-free garage floor. The MAV is the compact end: R-9 walls, a 24-inch DoveTail loading ramp and a garage pull-down screen.
Two things are worth knowing before you read the table. First, the MAV has no fuel station — Grand Design publishes N/A in the Fuel Capacity field on all five MAV plans and carries no fuel bullet anywhere in the MAV feature list. That is a published fact, not missing data, and it is the single clearest line between the MAV and the G-Class. Second, Grand Design publishes a garage length for every one of the 28 plans, which is unusual — Heartland publishes none for any Cyclone. Where the factory prints that length without a unit, we show it in feet and flag it, because feet is our reading and not the factory's.
02 Floorplans profiled in depth
Eight floorplans are profiled in full — two from each roster, chosen as the floor and ceiling of each, so the table spans the family end to end: the entry and the nine-berth flagship, the entry and the biggest-payload G-Class fifth wheel, the single-slide and the longest-garage G-Class trailer, and the lightest and the largest MAV.
| Floorplan | Type | Dry wt | Length | Garage | Sleeps | Notable · MSRP |
|---|---|---|---|---|---|---|
| Momentum FW · 10 floorplans | ||||||
| 344M | 5W | 15,910 lbs | 39 ft 11 in | 11 ft | 6 | Entry flagship — lowest GVWR of the ten, tightest payload in the roster · $167,581 |
| 392M | 5W | 18,114 lbs | 45 ft 11 in | 17 ft | 9 | Sleeps nine, 17-ft garage — longest fifth-wheel garage in the family · $183,537 |
| Momentum G-Class FW · 6 floorplans | ||||||
| 320G | 5W | 13,100 lbs | 36 ft 3 in | 11 ft | 6 | Entry G-Class 5W — lightest pin of any Momentum fifth wheel · $127,910 |
| 394G | 5W | 16,400 lbs | 44 ft 11 in | 15 ft* | 7 | Most payload of any Momentum fifth wheel — 6,100 lbs, triple awning · $126,344 |
| Momentum G-Class TT · 7 floorplans | ||||||
| 21G | TT | 7,280 lbs | 26 ft 11 in | 14 ft* | 6 | Entry G-Class trailer — the only single-slide plan in its roster · $73,876 |
| 30G | TT | 9,139 lbs | 34 ft 10 in | 20 ft 7 in | 7 | Longest garage of all 28 floorplans — 20 ft 7 in, king bed · $80,442 |
| Momentum MAV · 5 floorplans | ||||||
| 17MAV | TT | 5,542 lbs | 22 ft 11 in | 11 ft 6 in | 2 | Lightest and cheapest Momentum — payload is 80% of its dry weight · $47,462 |
| 28MAV | TT | 8,300 lbs | 33 ft 11 in | 10 ft 4 in | 6 | Top of the MAV range — the only MAV with a slide-out · $60,211 |
All figures are Grand Design's own MY2027 factory values. Payload is the published GVWR minus the published UVW — Grand Design publishes no separate cargo-capacity field, and this is the same arithmetic the trade catalogs use, so payload is shown unflagged. Garage lengths marked with an asterisk are published by the factory as a bare number with no unit; feet is the only reading consistent with the roster, but the unit is our interpretation. Interior height is omitted on the flagship Momentum fifth-wheel roster: the factory's field returns the exterior width (101 inches) on all ten of those plans, so it is unusable. Real loaded pin and tongue weights run well above the dry figures once a garage is loaded — weigh the loaded unit and confirm against your tow vehicle's ratings.
03 The rest of the MY2027 line
The remaining 20 floorplans are catalogued here from the factory's published specifications, with full weights, garage lengths and fuel capacities. Their in-depth profiles are planned but not yet published.
| Floorplan | Type | Dry | GVWR | Payload | Pin / tongue | Garage | Fuel |
|---|---|---|---|---|---|---|---|
| Momentum FW | |||||||
| 351MS | 5W | 15,760 | 19,000 | 3,240 | 3,000 | 11 ft | 60 gal |
| 381MS | 5W | 17,722 | 23,500 | 5,778 | 3,726 | 15 ft | 60 gal |
| 395MS | 5W | 15,600 | 22,500 | 6,900 | 3,200 | 14 ft | 60 gal |
| 399M | 5W | 19,170 | 23,500 | 4,330 | 3,406 | 12 ft 6 in | 60 gal |
| 410TH | 5W | 16,800 | 22,500 | 5,700 | 3,600 | 13 ft 6 in | 60 gal |
| 395MT | 5W | 19,100 | 23,500 | 4,400 | 3,760 | 14 ft* | 60 gal |
| 396DB | 5W | 19,100 | 23,500 | 4,400 | 3,760 | 10 ft 10 in | 60 gal |
| 414M | 5W | 18,500 | 23,500 | 5,000 | 3,800 | 14 ft | 60 gal |
| Momentum G-Class FW | |||||||
| 325G | 5W | 12,603 | 18,000 | 5,397 | 2,638 | 15 ft | 60 gal* |
| 350G | 5W | 13,400 | 18,000 | 4,600 | 2,600 | 14 ft 6 in | 30 gal |
| 363G | 5W | 14,250 | 19,000 | 4,750 | 3,100 | 13 ft* | 30 gal |
| 415G | 5W | 15,310 | 22,500 | 7,190 | 3,422 | 14 ft* | 30 gal |
| Momentum G-Class TT | |||||||
| 23G | TT | 7,669 | 13,000 | 5,331 | 1,242 | 15 ft* | 30 gal |
| 25G | TT | 8,600 | 13,000 | 4,400 | 1,400 | 13 ft 6 in | 30 gal |
| 28G | TT | 9,153 | 13,000 | 3,847 | 1,368 | 16 ft 6 in | 30 gal |
| 29GS | TT | 9,720 | 13,000 | 3,280 | 1,500 | 11 ft* | 30 gal |
| 31G | TT | 9,700 | 13,000 | 3,300 | 1,572 | 13 ft | 30 gal |
| Momentum MAV | |||||||
| 22MAV | TT | 5,900 | 9,950 | 4,050 | 943 | 13 ft 6 in | None — N/A published |
| 24MAV | TT | 6,650 | 11,000 | 4,350 | 1,200 | 18 ft | None — N/A published |
| 27MAV | TT | 6,900 | 11,000 | 4,100 | 1,187 | 13 ft 6 in | None — N/A published |
Weights in pounds. Two entries in the fuel column need reading carefully. The five MAV plans publish no fuel capacity — the factory prints N/A, the MAV feature list carries no fuel bullet, and four independent factory surfaces agree; that is the roster's defining omission, not a gap in this table. The 325G publishes 60 gallons where its five G-Class fifth-wheel siblings publish 30, and it is flagged rather than normalised: the 325G also carries the flagship's 140-gallon fresh tank against its siblings' 98, so it reads as a plan built on flagship plumbing — and Grand Design's own G-Class fifth-wheel page omits the gallon figure from its fuel bullet entirely, where the G-Class travel-trailer page states 30 gallons outright. The factory declines to make the 30-gallon claim line-wide for this roster, so we do not make it for them.
04 How to choose
Start with the tow vehicle, because Momentum spans a wider towing range than any other line here. The MAV is the only roster a well-rated half-ton should be considering: the 17MAV is 5,542 pounds dry with an 873-pound tongue, and its payload — 4,408 pounds, roughly eighty percent of its own empty weight — is larger than the entry flagship fifth wheel's, at a third of the price. The 28MAV stretches that to sleep six and adds the roster's only slide, but the payload drops to 2,700 pounds and the garage gets shorter. Neither has a fuel station.
The G-Class travel trailers are the bridge: a real toy-hauler garage, a 30-gallon fuel station and a flat wheel-well-free floor behind a bumper pull. The 21G is the entry — the only single-slide plan of the seven, 11,000 pounds of GVWR, a 1,056-pound dry tongue. The 30G carries the longest garage in the entire family at 20 feet 7 inches, longer than any Momentum fifth wheel including the flagship, plus a king bed — but read its 3,861-pound payload alongside that garage floor, because the space will take more than the axles will.
The G-Class fifth wheels are where the payload arrives. The 320G has the lightest pin of any Momentum fifth wheel at 2,300 pounds; the 394G carries 6,100 pounds of payload — more than any Momentum fifth wheel including the flagship 392M — and lists below the smaller 320G. At the top, the flagship Momentum buys independent suspension with disc brakes, the 60-gallon dual station and the 20-cubic-foot fridge: the 344M is the entry but carries the line's tightest payload at 3,090 pounds, and the 392M answers that with 5,386 pounds, a 17-foot garage and nine berths. If the 344M's payload math worries you, the honest options are the 392M or a G-Class.
05 What to weigh before buying
A toy hauler's dry hitch weight is a floor, not a figure
Every pin and tongue weight on this hub is a factory dry number. A toy hauler's real loaded hitch weight runs well above it, because the garage is behind the axles on a fifth wheel and the living space is ahead of them on a trailer — and because a 60-gallon fuel station is roughly 360 pounds of fuel at about six pounds a gallon, and 140 gallons of fresh water is over 1,100 more. Dry pins here run from 873 to 3,800 pounds. Treat brochure figures as a starting point, weigh the loaded unit, and confirm against your truck's payload and rear-axle rating — not just its towing number.
Payload and garage length are different questions
Momentum publishes both, and they do not track each other. The 30G has the longest garage in the family — 20 feet 7 inches — on 3,861 pounds of payload; the 394G has 6,100 pounds of payload behind a 15-foot garage. A long garage will physically accept more machinery than the axles are rated to carry, and nothing on the trailer will tell you when you have passed the line. Decide which constraint actually binds for what you haul, then read the other column.
Standard solar differs by roster — and the factory's own page disagrees with itself on one
Each roster ships a different standard solar package, and on a toy hauler that matters, because the garage is where the power goes. The flagship Momentum publishes a 330-watt roof-mounted panel with a 50-amp Bluetooth charge controller, inverter prep and two USB dock ports. The G-Class travel trailer publishes 220 watts with a 30-amp controller. The MAV publishes 200 watts — but its page calls it a solar prep in the prose and a solar panel in the package heading, and a prep is wiring while a panel is a panel, so it is shown here as a prep. And the G-Class fifth wheel carries no wattage on this site at all: Grand Design's own G-Class fifth-wheel page states 175 watts in its prose and 330 watts in its package heading. Both cannot be standard, no third factory surface breaks the tie, and picking one would be a guess — so the controller rating stands alone and the panel is left unstated. Ask the dealer to confirm it in writing.
The MAV's missing fuel station is the roster's defining line
Grand Design publishes N/A in the Fuel Capacity field on all five MAV plans, omits the fuel station from the MAV brand page's package list, carries no fuel bullet on the MAV brand page, and carries none in any MAV plan's standard-features list. Four independent factory surfaces agree, so no fuel figure appears on any MAV page here. If an onboard pump and tank matter to you — and on a toy hauler they usually do — the entry point is the G-Class, not the MAV.
06 What every Momentum has
08 Recalls
NHTSA lists 19 recall campaigns affecting this line. The earliest was reported 4 Aug 2014 and the most recent 26 Jan 2026. 18 of them are matched on NHTSA’s own model field; the other 1 names this line in the recall text and is marked named in text below, which is a weaker match and shown as one.
| Reported | Campaign | Component | What can go wrong |
|---|---|---|---|
| 26 Jan 2026 | 26V044000 | Suspension | An axle that moves out of position can cause a loss of vehicle control and increase the risk of a crash. |
| 13 Nov 2025 | 25V784000 | Equipment | A propane leak in the presence of an ignition source can increase the risk of a fire. |
| 6 May 2025 | 25V281000 | Structure | Steps that detach while in use increase the risk of injury. |
| 10 Dec 2024 | 24V916000 | Structure | The tread may detach from the step, increasing the risk of a trip and fall injury. |
| 15 Nov 2024 | 24V861000 | Equipment | A gas leak in the presence of an ignition source can increase the risk of a fire. |
| 12 Mar 2024 | 24V193000 | Suspension | An axle that moves out of position can cause a loss of vehicle control and increase the risk of a crash. |
| 17 Aug 2023 | 23V586000 | Trailer hitches | Underrated chains can allow the trailer to detach from the tow vehicle, increasing the risk of a crash. |
| 17 Jul 2023 | 23V490000 | Suspension | An axle that moves out of position can cause a loss of vehicle control and increase the risk of a crash. |
| 29 Jun 2023 | 23V455000 | Suspension | A detached wheel increases the risk of a crash. |
| 15 Jun 2023 | 23V428000 | Equipment | Incorrect weight information on the label can cause the vehicle to be overloaded, increasing the risk of a crash. |
| 11 Aug 2022 | 22V618000 | Structure | A falling ramp door increases the risk of injury. |
| 9 Aug 2022 | 22V603000 | Structure | An awning that drops or extends beyond normal operation can increase the risk of injury. |
| 22 Jun 2022 | 22V442000 | Electrical system | An overheated power supply wire increases the risk of a fire. |
| 6 May 2022 | 22V308000 | Equipment | A gas leak in the presence of an ignition source can increase the risk of a fire. |
| 28 Jan 2022 | 22V038000 | Equipment | An electrical arc increases the risk of a fire. |
| 26 May 2021 | 21V393000 | Equipment | Excessive gas pressure and a larger than intended appliance flame can increase the risk of a fire. |
| 21 Nov 2016 | 16V841000 | Equipment | If the hinges separate from the ladder while in use, the ladder may fall from the vehicle, increasing the risk of injury. |
| 8 Dec 2015 | 15V822000 | Equipment | If the operator loads vehicle per the information on the label, the vehicle may exceed the Gross Vehicle Weight Rating (GVWR), thereby increasing the risk of a… |
| 4 Aug 2014 | 14V476000 named in text | Suspension | A spring that detaches from the hanger may result in a loss of control of the trailer, increasing the risk of a crash. |
Coverage is not complete, and this matters. These campaigns come from two passes over NHTSA’s public record: a query-by-query harvest of the recall API (1,556 queries, of which 0 failed and 242 returned an explicit zero), and a sweep of NHTSA’s complete recall flat file (325,650 rows), which added 46 campaigns the API harvest had missed. It missed them because the roster it worked from was built by a catalog endpoint that refuses most requests, so entire manufacturer names were never asked about — NHTSA files several Forest River sub-brands as makes of their own. Two limits remain: NHTSA sometimes files a roster under a parent name, and some matches below rest on the wording of the recall rather than its model field. Campaigns affecting only pre-2005 units fall outside this catalog’s range and are not listed. This page is a starting point, not a clearance. Check a specific VIN at NHTSA before you buy, and again before you tow.
09 Owner-reported problems
Owners have filed 201 complaints with NHTSA about this line. The earliest was filed 9 Jun 2015 and the most recent 22 Jul 2026. The breakdown below is what those owners actually reported, grouped by the component NHTSA assigned.
Safety outcomes in this set: 1 report describing a crash and 4 reports describing a fire. These are the owner’s own account of what happened and have not been verified by NHTSA.
What gets reported
| Component group | Reports | Share |
|---|---|---|
| Structure | 83 | 41% |
| Unknown or other | 39 | 19% |
| Suspension | 20 | 10% |
| Latches/locks/linkages | 18 | 9% |
| Service brakes | 16 | 8% |
| Equipment | 10 | 5% |
| Electrical system | 7 | 3% |
| Wheels | 5 | 2% |
| Exterior lighting | 1 | 0% |
| Fuel/propulsion system | 1 | 0% |
| Tires | 1 | 0% |
Most recent reports
The most recent 10 owner reports filed on this line, newest first. Wording is NHTSA’s summary of what the owner described.
| Filed | Component | Miles | What the owner reported |
|---|---|---|---|
| 22 Jul 2026 | Structure › Frame and members | 0 | The contact owns a 2022 Grand Design Momentum RV. The contact stated that there was an excessive frame flex in the body of the RV. The contact stated that the walls were separating, and the doors were opening unintendedly while driving. The vehicle was taken to the local dealer, where it was… |
| 14 Jul 2026 | Structure | — | We own a 2021 Grand Design Momentum 393g toy hauler that has severe frame flex and bolts in slide have started backing out. We noticed this when driving and the extreme pushing/chucking when accelerating or braking and also the visible failure on the unit. We have contacted Gran Design, the… |
| 8 Jul 2026 | Equipment › Recreational vehicle/trailer | — | I am reporting a serious, progressive structural defect involving excessive frame flex and structural failure on a 2021 Grand Design Momentum 395MS fifth-wheel RV. This complaint directly aligns with the ongoing NHTSA investigation PE24-0209. The unit exhibits clear and worsening structural… |
| 6 Jul 2026 | Equipment › Recreational vehicle/trailer | — | Front of 5th wheel movement caused by excessive frame failure, inspection shows 1/2" out of compliance. Lag screws around interior upper deck backed out and have to be tightened regularly, soft spot in floor between bathroom and upper deck bedroom. Additional body screws needed in garage area to… |
| 22 Jun 2026 | Structure | — | I'm submitting this report on our RV because we are discovering we very likely have an issue with the frame which is causing over flexing when it is being towed. This has caused damage inside the RV where the trim and cabinetry are damaging the walls due to more movement than should be occurring… |
| 27 May 2026 | Structure | — | Frame cracked and suspension issues. |
| 24 May 2026 | Structure › Body | — | Regarding 2021 Grand Design Momentum 376THS: Compartment doors popping open during transport; Grand Design Customer Satisfaction Campaign TSB-24-001 dated 11/1/2025 regarding frame flex and wall securement. Returned to dealer on 12/1/2025 for inspection. Dealer found the following: All doors except… |
| 22 May 2026 | Structure | — | Scheduled appointment with dealer for the Grand Design Frame Flex recall today, 22 May 2026. Approximately 4 hours after dropping the trailer off the dealer called and said that the technician found significant frame flex and that the unit was unsafe to be towed. No other information was provided… |
| 14 May 2026 | Structure | — | On the driver side of the 2018 Momentum Toy Hauler cracked in two locations above the center leaf spring holder. This issue occurred on May 1, 2025. While pulling out of a shop after having the leaf spring holders replaced the axle traveled through a small depression on the ground causing the frame… |
| 11 May 2026 | Latches/locks/linkages › Doors › Latch | 200 | The contact owns a 2022 Grand Design Recreational Trailer. The contact stated that while the trailer was parked, an inspection of the trailer revealed that the front passenger-side door was inoperable and failed to properly open and close. The contact also noticed sawdust present in the bedroom… |
How this count is drawn. A report is counted here only when NHTSA’s own model field names this line. What the owner typed in the description is never used to attribute a report: our line names are ordinary English words, and an owner writing “imagine my surprise when the axle went” or naming the state of Montana is not reporting a Grand Design Imagine or a Keystone Montana. The total does include reports NHTSA filed under this line’s own trim badges — Momentum 355TH and Momentum 385TH — because each names the same trailer.
Read these as reports, not as findings. Complaints are submitted by owners and NHTSA does not verify them; no complaint here has been confirmed as a defect, and none of them is a recall. The sample is also self-selected — only owners motivated to file appear in it — so a high count tracks how many units a line sold at least as much as how well it was built. Use the pattern, not the total: a component that keeps recurring is worth inspecting on any used unit. File or search complaints at NHTSA.