Lippert
Lippert Solid Step: a doorway-mounted step that folds up with the RV
The step that belongs to the door, not the campsite. The 678027 listing says it fits entry doors 35 to 44 inches off the ground and is rated 400 pounds. The newer 4.0 triple adds an 8-inch rise, a 500-pound claim, and lift-assist struts.
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8.7/10 RigRank score
Portable stairs are what you add when the factory step is a single wobbly tread or there is no step at all and you don't want to drill the doorway. A Solid Step is the other decision: it bolts to the RV, the treads stay parallel to the ground, and it folds up into the doorway for travel. That is the product that fixes wobble by not being a freestanding ladder.
We linked model 678027 (B06Y18JPF4), the 30-inch Solid Step, as the primary ASIN because it was in stock with units still available on the day we checked. The listing says to measure the inside door-frame width and round up to the nearest even number, that it fits doors 35 to 44 inches above the ground, and that capacity is 400 pounds. Mounting screws are included. If your door is not about 30 inches wide, this exact ASIN is the wrong width even if the height is right. Lippert sells other widths. Don't stretch a 30-inch step across a wider opening.
The Solid Step 4.0 triple (B0GNP3JQ5S) is the current design: 30-inch width, 8-inch rise, 13-inch top tread, 8.5-inch lower treads, 500-pound claim, gas struts, ratcheting legs. An 8-inch rise is inside the calculator's default maximum and a little taller than the 7.75-inch comfort target. Only one unit showed as in stock when we looked, with more on the way. If that listing is gone when you click, the 678027 is the verified fallback, with the older 400-pound claim and the 35-to-44-inch door range.
This is a project. You are drilling the RV. If the floor is soft or the doorway is out of square, a Solid Step will not feel solid, and that will not be the step's fault. It is also the right answer for anyone who is tired of deploying a loose stair every night. We have not installed one for this review.
What the listing actually says
| 678027 fit | Doors 35–44 in off the ground, 30 in wide |
|---|---|
| 678027 capacity | 400 lb, listing claim |
| 4.0 rise | 8 in, 500 lb claim, lift-assist struts |
| Checked | Live Amazon listing on 2026-11-10. In stock that day. |
Works in its favor
- Mounts to the door and folds away. Nothing to forget at the site
- 678027 listing: 35–44 inch doors, 400 lb, 30-inch width
- 4.0 listing: 8-inch rise, deeper top tread, lift assist, 500 lb claim
Holds it back
- Width is specific. A 30-inch step does not fit every door
- Installation is permanent relative to a portable stair
- The 4.0 listing had a single unit in stock when we verified it
Which listing to open
- 30-inch Solid Step, model 678027 B06Y18JPF4 on Amazon
- Solid Step 4.0 triple, 30-inch, lift assist B0GNP3JQ5S on Amazon
Questions worth answering first
Solid Step or a portable stair with a rail?
Solid Step if you will use the RV often and the door width matches a Lippert size. A portable OUTPRIZE or DNYKER stair if you cannot or will not drill the doorway, or if the rig already has a step and you only need help at tall sites. The calculator tells you the rise. It does not tell you which mounting style you want.
See where this sits in the Best RV Steps in 2026, Ranked roundup.