Forest River Rockwood A-Frame A122S vs Aliner Classic Rear Sofa/Mattress
The difference that matters
Two hard-sided A-frames that fold flat for towing, and the Aliner Classic is the lighter and better-equipped of the pair. It weighs 1,725 lb dry with a 160 lb tongue, against 2,120 and 284 for the Rockwood A122S. Its standard kit runs to a heat-pump air conditioner, an 18,000 BTU furnace, a water heater, a 3.2 cu ft 12V fridge, a microwave and an outside shower.
The Rockwood counters with cargo room. Its 3,284 lb GVWR leaves 1,164 lb for gear, and a diamond-plate storage area at the front gives bulky items somewhere to ride. It folds to just 5 ft 1 in for towing, lower than the Aliner's 64 in, and it sleeps three.
The Aliner's high-wind lift assist sets it up in about 30 seconds, and its two beds, 46 by 76 in at the front and 60 by 76 in at the rear, give a couple a choice of where to sleep.
- Forest River Rockwood A-Frame A122S
- Campers who haul a lot of gear and want the lowest folded height for a garage or carport
- Aliner Classic Rear Sofa/Mattress
- Small-car owners traveling as a couple who want heat, air and hot water in a camper that sets up in a minute.
Weights
Weights
2027 maker figures
- Dry weight (UVW)
- 2,120 lb
- GVWR
- 3,284 lb
- Hitch weight, dry
- 284 lb
- Cargo capacity (CCC)
- 1,164 lb
1,164 lb between brochure dry weight and GVWR. Water (8.3 lb a gallon), food, gear, propane and dealer-added options all come out of it.
Weights
2026 maker figures
- Dry weight (UVW)
- 1,725 lb
- GVWR
- 3,000 lb
- Hitch weight, dry
- 160 lb
- Cargo capacity (CCC)
- not published
1,275 lb between brochure dry weight and GVWR. Water (8.3 lb a gallon), food, gear, propane and dealer-added options all come out of it.
Spec for spec
| Forest River Rockwood A-Frame A122S | Aliner Classic Rear Sofa/Mattress | |
|---|---|---|
| Dry weight (UVW) | 2,120 lb | 1,725 lb |
| GVWR | 3,284 lb | 3,000 lb |
| Hitch / pin weight, dry | 284 lb | 160 lb |
| Cargo capacity (CCC / OCCC) | 1,164 lb | — |
| GVWR minus dry weight | 1,164 lb | 1,275 lb |
| Exterior length | 18.33 ft | 15 ft |
| Exterior height | 5.08 ft | 5.33 ft |
| Sleeps | 3 | — |
| Slide-outs | 0 | 0 |
| Fresh water | — | 11 gal |
| Factory solar | None | None |
Bold is the lighter or larger figure. A dash means the maker does not publish it.
To scale
- Forest River Rockwood A-Frame A122S · 18.33 ft long · 5′1″ tall
- Aliner Classic Rear Sofa/Mattress · 15 ft long · 5′4″ tall
Forest River Rockwood A-Frame A122S
Full spec sheet, sources →
Aliner Classic Rear Sofa/Mattress
Full spec sheet, sources →