Heavy duty
Brooklyn BeddingTitan Plus Luxe
- Hybrid
- 13 in thick
- Plush
$1,665Short Queen - 60x75 · 1 in shorter than your platformSee price
Grand Design Imagine 15RB mattress size
Main bed60 × 76 inCustom size
RV mattress sellers stock this exact size, or order a custom size cut to your platform.
Grand Design spec sheet, 2025.
Mattresses in 60 × 76 in
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Natural latex
PlushBedsEco Green Organic Latex
- Latex
- 8 in thick
$1,175Queen Short (60 × 75) · 1 in shorter than your platformSee price
Custom size
Mattress InsiderLuxury Gel Memory Foam
- Memory foam
- 8 in thick
- not stated
Made to 60 × 76 inGet a quote
The Imagine bedroom. Measure the platform, not the old mattress, before you buy.
Bed sizes by year
| Year | Main bed | Bunks | Other beds | Source |
|---|---|---|---|---|
| 2023 | 60 × 80 in Queen | – | – | Dealer report |
| 2024 | 60 × 76 in | – | – | Grand Design spec sheet |
| 2025 | 60 × 76 in | – | – | Grand Design spec sheet |
Years not listed weren't published.
The 15RB floorplan
Grand Design's 2025 15RB floorplan.
Is this your 15RB?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2023 | Imagine AIM 15RB | 19' 11" | – |
| 2024 | Imagine AIM 15RB | 19' 11" | 4 |
| 2025 | Imagine AIM 15RB | 19' 11" | – |
| 2025 | Imagine AIM 15RB | 19' 11" | 4 |
Other Imagine mattress sizes
Sources
- Grand Design (pdf.granddesignrv.com), archived copy: https://web.archive.org/web/20251007143443/https://pdf.granddesignrv.com/SpecSheet/ImagineAIM/ImagineAIM-SpecSheet-15RB.pdf
- Grand Design (granddesignrv.com), archived copy: https://web.archive.org/web/20221128221150/https://granddesignrv.com/showroom/2023/travel-trailer/imagine-aim/floorplans/15rb
- Grand Design (granddesignrv.com), archived copy: https://web.archive.org/web/20231210133604/https://www.granddesignrv.com/travel-trailers/imagine-aim/15rb
- Grand Design (granddesignrv.com), archived copy: https://web.archive.org/web/20250719114954/https://www.granddesignrv.com/travel-trailers/imagine-aim/15rb
Questions
What size mattress is in the Grand Design Imagine 15RB?
The main bed is 60 × 76 in (Grand Design spec sheet, 2025).