4 floorplans · 2018–2020
Forest River Cardinal mattress sizes
Pick your floorplan and year for the mattress size that fits.
The floorplan code is on the decal by your door or in your owner's paperwork.
Floorplans
Cardinal mattress sizes by floorplan
| Floorplan | Year | Main bed | Bunks | Source |
|---|---|---|---|---|
| 304SR | 2020 | 72 × 80 in | – | Forest River spec sheet |
| 378LF | 2020 | 72 × 80 in | – | Forest River spec sheet |
| 3045RLLE | 2020 | 72 × 80 in | – | Forest River spec sheet |
| 3850RLX | 2019 | 72 × 80 in | – | Forest River spec sheet |
The newest year with a published size is shown. Each floorplan page lists every year.