To get that third step the best option for you is the MORryde StepAbove RV Steps for 23-3/4" to 26-1/4" Wide Doorways - 3 Steps # MR98RR. This will attach to the floor just past your door frame and fold up into the trailer while not in use. view full answer...
In order to determine if the SolidStep Manual Fold-Down Steps # LC733931 you mentioned will work for your 2018 Bighorn 3160EL, you will need to make two measurements. First take the measurement of the doorway flange, then take a measurement of the distance from the mounting point to the ground to determine the amount of steps you'll need.
The first measurement is known as the "Doorway Width"; and the second measurement is called the "Entry Height".
Using the chart attached, and the... view full answer...
The TorkLift GlowStep Revolution Scissor Steps part # TLA8003 which are a fit for a 2011 Heartland Greystone 32RE will work with an entry height of 25-1/2" - 36". The accordion style hinges on the steps combined with the adjustable landing gear legs are what allows the steps to accommodate this wide range. That said, the TorkLift GlowStep Revolution Scissor Steps part # TLA8004 which has an entry height range of 32-1/2" - 44" will also work as well and will allow for more error when parking... view full answer...
Great question! I have a solution for you. Since Lippert doesn't have a 4 step and their 3 step is a little to short, I recommend going with the MORryde. It has four steps, will fit all of your RV doorway dimensions and height requirements.
**MORryde StepAbove RV Steps for 27-3/4" to 30-1/4" Wide Doorways - 4 Steps # MR28RR.
*SolidStep Manual Fold-Down Steps for 29" to 36" Wide RV Door Frames - Triple - Aluminum # LC791573.
We do not have a Lippert Solid Step that has 4 steps. However,... view full answer...
For the measurements you provided your best option is the MORryde StepAbove Fold-Down Steps for 23-3/4" to 26-1/4" RV Door Frames - 8" Drop Item # MR98RR view full answer...
Since your doorway width and threshold height is both 29 inches the Lippert SolidSteps you'd need would be the part # LC791573 which matches that perfectly. If the bubble on your level is with the two lines like you mentioned then your trailer would be level enough. view full answer...