2026 GRAND DESIGN MOMENTUM M-CLASS 399M
55
Rv TypeToy Hauler
Length45 ft
Fuel Type-
Mileage-
Description
2026 Grand Design Momentum M-Class 399M, Toy Hauler Fifth Wheel, New 2026 Grand Design Momentum M-Class 399M
"This is the manufacturer's minimum allowed advertised price, contact us today for your unbeatable personalized quote."
NEW 2026 Grand Design Momentum 399M Toy Hauler Elevate Every Adventure
If you ve been searching for a fifth wheel toy hauler that checks every box power, luxury, workspace, entertainment, and real off-grid capability the Momentum 399M was built for you. Grand Design s flagship toy hauler welcomes thrill-seekers and full-timers alike with refined residential comforts and rugged durability that can keep up with wherever your journey leads.
Load Up, Level Up, and Live Large
The 12' 6" separate garage gives you the freedom to bring quads, dirt bikes, kayaks, e-bikes anything that fuels your weekends. Once unloaded, transform the space into an extra suite with the optional Liftsuite system, complete with under-glow accent lights for a premium touch. And when you want to take the party outside, the side patio becomes your open-air living room outfitted with a 65" TV, a 1.7 cu. ft. fridge, and an exterior griddle to keep everyone fed and smiling.
A True Chef's Kitchen Indoors or Outdoors
Rainy day? No problem. The interior kitchen is a culinary playground, featuring a kitchen island, pull-out countertop extension, deep storage, pantry, and upscale appliances. Whether you re prepping trail-day snacks or hosting friends for dinner, you ll have the space and style to do it right.
Relaxation Worth Coming Home To
Kick back in the main living area where an L-shaped reclining sofa faces a
"This is the manufacturer's minimum allowed advertised price, contact us today for your unbeatable personalized quote."
NEW 2026 Grand Design Momentum 399M Toy Hauler Elevate Every Adventure
If you ve been searching for a fifth wheel toy hauler that checks every box power, luxury, workspace, entertainment, and real off-grid capability the Momentum 399M was built for you. Grand Design s flagship toy hauler welcomes thrill-seekers and full-timers alike with refined residential comforts and rugged durability that can keep up with wherever your journey leads.
Load Up, Level Up, and Live Large
The 12' 6" separate garage gives you the freedom to bring quads, dirt bikes, kayaks, e-bikes anything that fuels your weekends. Once unloaded, transform the space into an extra suite with the optional Liftsuite system, complete with under-glow accent lights for a premium touch. And when you want to take the party outside, the side patio becomes your open-air living room outfitted with a 65" TV, a 1.7 cu. ft. fridge, and an exterior griddle to keep everyone fed and smiling.
A True Chef's Kitchen Indoors or Outdoors
Rainy day? No problem. The interior kitchen is a culinary playground, featuring a kitchen island, pull-out countertop extension, deep storage, pantry, and upscale appliances. Whether you re prepping trail-day snacks or hosting friends for dinner, you ll have the space and style to do it right.
Relaxation Worth Coming Home To
Kick back in the main living area where an L-shaped reclining sofa faces a
RV details
Type
Toy Hauler
Condition
New
Length
45 ft
GVWR
22,500 lbs
Odometer
0 mi
Slide-outs
3
Sleeping capacity
4
Water capacity
140 gal
Interior color
ARTISAN
Floor plan
MOMENTUM M-CLASS
Dealer stock ID
21173437
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Dealer information
Little Dealer Little Prices - Mesa, AZ
$137,989
Contact the seller
Call the dealer
(855) 922-7737
RV code: 6885