2026 Grand Design Momentum G-Class TT 21G
- Year 2026
- Make Grand Design
- Model Momentum G-Class TT
2026 Grand Design Momentum G-Class TT 21G
2026 Grand Design Momentum G-Class TT 21G
The all new Momentum G-Class is lighter without sacrificing any comfort or spaciousness — thanks to our tall ceilings and slide outs. With all of the quality, innovation, and functionality that our family of Momentum owners love, it's everything you need and nothing you don’t.
Features may include:
- Thermal Roof Design (R-40)*
- Full Laminated Walls (R-7)*
- Triple Insulated Main Floor (R-40)*
- Triple Insulated Garage Floor (R-40)*
- Vented Attic
Dimensions
Overall Height
12' 2"
Overall Length
26' 11"
Overall Width
8' 5" | (w/ slide out): 11' 4"
Interior Height
7' 7"
Dimensions
Standard Bed: 60 X 80 Queen Bed | Shower: 27 X 36
Garage Length
14
Awning Size
19
Weights
Hitch Weight Capacity
920 lbs.
Unloaded Weight
6,400 lbs.
GVWR
11,000 lbs.
Capacities
Fresh Water Capacity
90 gal.
Gray Water Capacity
74 gal.
Black Water Capacity
39 gal.
LP Tank Capacity
40 gal
Sleeping Capacity
6
Fuel Capacity
30 lbs
Water Heater
Tankless
Refrigerator
8 cu. ft.
Features
Features
Propane Tanks: 2 | Construction Type: Laminated | Slide Room R-Value: R-7 | Garage R-Value: R-30 | Slides: 1 | Awnings: 1
R-Value, Floor
R-40
R-Value, Wall
R-7
R-Value, Roof
R-40
Operational
Furnace Output
30,000 BTU
Air Conditioner Output
15,000 BTU
Chassis
Axle Count
2
Wheels & Tires
Wheels
16 in.
Tires, Rear Specification
ST235/80R16LRE