Great all around
RVMattress.comSignature Hybrid
- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
Sleep Foundation: Best Mattress Overall Read review
$1,465Queen · list priceSee price
Grand Design Momentum 21G mattress size
Main bed60 × 80 inQueen
That's the same size as a regular queen, so any standard queen mattress fits.
About the RV queen size →Grand Design spec sheet, 2027.
Mattresses in 60 × 80 in
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Best value
RVMattress.comCopperFlex Essential
- All-foam
- 6 in thick
- five comfort options
$524Queen · list priceSee price
Firm
RVMattress.comPlank Firm Luxe
- Hybrid
- 13 in thick
- Firm / Extra Firm
$1,598Queen · list priceSee price
Cooling
RVMattress.comAurora Luxe Cooling
- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
Sleep Foundation: Best Mattress for Temperature Regulation Read review
$1,999Queen · list priceSee price
Heavy duty
RVMattress.comTitan Plus Luxe
- Hybrid
- 13 in thick
- Plush
$1,665Queen · list priceSee price
Helix pick
HelixHelix Midnight
- Hybrid
- 11.5 in thick
- Medium Feel
Sleep Foundation: Best Mattress for Side Sleepers Read review
$1,183Queen · list priceSee price
RV hybrid
RVMattress.comCopperFlex RV Hybrid
- Hybrid
- 10 in thick
- Medium-Firm
$799Queen · list priceSee price
Custom size
Mattress InsiderLuxury Gel Memory Foam
- Memory foam
- 8 in thick
- not stated
Made to 60 × 80 inGet a quote
The Momentum bedroom. Measure the platform, not the old mattress, before you buy.
Bed sizes by year
| Year | Main bed | Bunks | Other beds | Source |
|---|---|---|---|---|
| 2024 | 60 × 80 in Queen | – | – | Grand Design spec sheet |
| 2025 | 60 × 80 in Queen | – | – | Grand Design spec sheet |
| 2026 | 60 × 80 in Queen | – | – | Grand Design 2026 model-year brochure |
| 2026 | 60 × 80 in Queen | – | – | Grand Design spec sheet |
| 2027 | 60 × 80 in Queen | – | – | Grand Design spec page |
| 2027 | 60 × 80 in Queen | – | – | Grand Design spec sheet |
Years not listed weren't published.
The 21G floorplan
Grand Design's 2027 21G floorplan.
Is this your 21G?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2021 | Momentum G-Class Travel Trailer 21G | 26'11" | – |
| 2022 | Momentum G-Class Travel Trailer 21G | 26'11" | – |
| 2023 | Momentum G-Class Travel Trailer 21G | 26'11" | – |
| 2024 | Momentum G-Class Travel Trailer 21G | 26' 11" | 6 |
| 2025 | Momentum G-Class Travel Trailer 21G | 26' 11" | 6 |
| 2026 | Momentum G-Class Travel Trailer 21G | 26' 11" | 6 |
| 2027 | Momentum G-Class Travel Trailer 21G | 26' 11" | 6 |
Other Momentum mattress sizes
Sources
- Grand Design (granddesignrv.com), archived copy: https://web.archive.org/web/20200810180720/https://www.granddesignrv.com/showroom/2021/toy-hauler/momentum-g-class-travel-trailer/floorplans/21g
- Grand Design (pdf.granddesignrv.com): https://pdf.granddesignrv.com/SpecSheet/Momentum-G-Class-TT/Momentum-G-Class-TT-SpecSheet-21G.pdf
- Grand Design (granddesignrv.com), archived copy: https://web.archive.org/web/20211026042711/https://www.granddesignrv.com/showroom/2022/toy-hauler/momentum-g-class-travel-trailer/floorplans/21g
- Grand Design (granddesignrv.com), archived copy: https://web.archive.org/web/20221017234451/https://www.granddesignrv.com/showroom/2023/toy-hauler/momentum-g-class-travel-trailer/floorplans/21g
- Grand Design (granddesignrv.com), archived copy: https://web.archive.org/web/20240520124632/https://www.granddesignrv.com/toy-haulers/momentum-g-class-travel-trailers/21g
- Grand Design (granddesignrv.com), archived copy: https://web.archive.org/web/20250328060635/https://www.granddesignrv.com/toy-haulers/momentum-g-class-travel-trailers/21g
- Grand Design (granddesignrv.com), archived copy: https://web.archive.org/web/20260317063808/https://www.granddesignrv.com/toy-haulers/momentum-g-class-travel-trailers/21g
- Grand Design (granddesignrv.com): https://www.granddesignrv.com/toy-haulers/momentum-g-class-travel-trailers/21g
Questions
What size mattress is in the Grand Design Momentum 21G?
The main bed is 60 × 80 in (Grand Design spec sheet, 2027).