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SolidStep Locking RV Storage Box - Powder Coated Steel - 100 lbs

SolidStep Locking RV Storage Box - Powder Coated Steel - 100 lbs

Item # LC664640
Our Price: $357.43
You Save: $65.21
RV Cargo Carrier
Shipping Weight: 53 lbs
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This 27-1/4" long x 11-5/16" wide storage box mounts to your RV's chassis underneath your SolidStep entry steps. Door flips down for easy access to your stored gear. Holds up to 100 lbs. Hardware, lock, and 2 keys included. Great Prices for the best rv cargo carrier from Lippert. SolidStep Locking RV Storage Box - Powder Coated Steel - 100 lbs part number LC664640 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (62)
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  • Videos (4)
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Lippert RV Cargo Carrier - LC664640

  • Cargo Bins
  • Chassis Mount
  • Lippert
  • 27-1/4 Inch Long

This 27-1/4" long x 11-5/16" wide storage box mounts to your RV's chassis underneath your SolidStep entry steps. Door flips down for easy access to your stored gear. Holds up to 100 lbs. Hardware, lock, and 2 keys included.


  • Storage box mounts to your RV's chassis to provide secure storage
    • Fits under your SolidStep entry steps where your old steps used to be installed
    • Requires an I-beam of 8" or larger for proper installation
  • Drop-down door provides easy access to cargo space
    • Lock and 2 keys included
  • Powder coated steel resists rust and corrosion
  • Quick and easy installation with included mounting hardware
  • Box dimensions: 27-1/4" long x 11-5/16" wide
  • Weight capacity: 100 lbs

664640 Lippert Components (LCI) Solid Step Locking RV Storage Box - Powder Coated Steel - 100-lb Capacity

Installation Details LC664640 Installation instructions

Video of SolidStep Locking RV Storage Box - Powder Coated Steel - 100 lbs

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Lippert SolidStep Locking RV Storage Box Installation - 2016 Forest River Salem Hemisphere Lite Trav

Shane: Hey guys, Shane here with Today, I have a 2016 Forest River Salem Hemisphere Light Travel Trailer. And I want to walk through how to install Lippert Components Storage Box. A box like this is going to be great for replacing your factory foldout steps, if you're putting in the Lippert Components Solid Steps. Box is going to take up the space where your steps were. And it's going to give you that extra storage space that you otherwise wouldn't have if you just remove your steps.

It's going to come with two keys that allows you to lock it, simple push of the button opens the lid and gives you plenty of room for storing anything in here that you may need. Maybe you have some jacks or something you want to put in here. Maybe some wood pieces. Maybe you have some extra hoses or something like that. Gives you plenty of room to get that stuff stored away so it's not sitting on the floor inside your camper.

Keep in mind with loading your stuff in here, this is going to have a hundred pound weight capacity.Another nice feature with it, it's going to have a nice rubber gasket all the way around so when it's closed, we're not going to have to worry about rain getting inside and getting our stuff on the inside wet.Some trailers may have a light that's on the frame rail for the steps because they don't actually have a porch light. What I did is I actually took that off and rerouted it and I actually put it on the front of the box so that it's still usable for the steps.Your box dimensions are going to be 27-and-a-quarter long by 1- and-5/16 wide.Overall, I really like this idea. I like this box. It's a heavy-duty metal construction. Adding this, once you have your solid steps on, I think is very beneficial.I'm going to go ahead and fold these down and show you what it looks like with the solid steps on too.

You can see there's no interference, a very nice clean look. And again, it's going to give you that extra storage space and take up that area that you otherwise would have open.As far as the installation process, it's pretty simple and straightforward. You're going to have a bracket that mounts directly to the frame rail and the box sits on that bracket and then bolts to that frame or to that bracket. So, it's a very simple installation.Now that we've gone over some of the features, let's walk through how to get it installed. To start your installation, the first thing you want to do, if you haven't taken out your steps is remove your steps.

You're going to have a bracket that comes in your box. We're going to take our bracket, we're going to set it in place. Try to center it with the center of the door so that our box is centered in there. Really, you don't want to have any movement up and down, only side to side with this because our frame rail is so thin or shallow, I guess. The kit's going to come with some large self-tapping screws. Once you get it centered, we're going to take the self-tappers and we're going to drive them right through the holes. Once you get one in, you're going to repeat the process for the remaining holes.Now, if you're modifying it like this, you want to make sure you connect your wires before you put your box in place. You can kind of see how I had to run it behind the bracket, because it's going to sit flat against here. Now, we're going to lift it up. We're going to take these two and we're going to slide them in those slots. What we're going to do is we're going to look inside. You can see where our brackets are. We're going to move it over. We're going to line it up with our holes and then install our hardware. We're going to have bolts with lock washers. We're going to line it up with the holes and install it in the four holes on the inside of the box. This is going to attach our box to the bracket.Once we get it mounted, we're ready to load our stuff up, close it, latch it into place, lock it up and you're ready to go. That's going to do it for a look at and installation on the Lippert Components Storage Box on our 2016 Forest River Salem Hemisphere Light Travel Trailer.

Customer Satisfaction Score:

Customer Reviews

SolidStep Locking RV Storage Box - Powder Coated Steel - 100 lbs - LC664640

Average Customer Rating:  4.5 out of 5 stars   (62 Customer Reviews)

This 27-1/4" long x 11-5/16" wide storage box mounts to your RV's chassis underneath your SolidStep entry steps. Door flips down for easy access to your stored gear. Holds up to 100 lbs. Hardware, lock, and 2 keys included.


I had installed the solid step stairs and the old fold out steps where still in place. Extra weight that was not needed. I purchased this and installed it easily myself. It was a clean fit and is used to store my road service gear (bottle jacks, lug wrenches and leveling blocks) to change tires. Definitely worth the purchase.


Fitment and workmanship is first class. Perfect companion to fill the space when we replaced factory steps with Lippert SolidStep on our 2013 Surveyor fifth wheels. Fits perfect, easy install, looks factory...I Like It !


The Storage boz is excellent, however it was difficult to install after removing the stairs. It turns out the frame on my trailer must be smaller than the design standard for developing this Storage Box. It is installed by slipping two tabs over a support frame. In order to fit on my trailer it was necessary to trim about 1/4" off the length of the tabs. Once I figured that out it became an easy installation. It is a good product.


A bit of an odd size couldn’t fit the wheel chocks I had intended it for, so I cut blocks to fit the box. Freed up space in pickup bed for more campfire wood. Excellent use of the space freed up installing the solid step. The box it came in was almost unrecognizable, surprised they could read the label to deliver it. Box came out almost pristine, a few scuff marks.


This is a good design & filled in the gap where the old camper steps used to be. It holds a lot of tools in an easily reachable spot.


This set of fold down steps are quality made! I love em! Easy to install, easy to use and fold away.


Great addition to the solid steps. It fills in the whole and gives added storage .


Great add on worth the money. I keep my drill and wheel leveler in here and a bag full of tools. No more wasted space. Getting ready to buy another stair and storage box for the rear door. Great use of space idea.


Thanks for checking. The items arrived today and I am having them installed tomorrow (Thursday.) Two of the boxes were damaged and had been resealed. A package of nut, bolts and screws were laying out on the driveway. I took photos in case the steps and lift were damaged. We'll find out tomorrow. Let's hope not. I'll tell you this I am very impressed with and your personnel follow up with my order. Even if there is some damage or missing parts I know it wasn't your fault. I will be looking to for any future needs. I'll take photos after installation.
Thanks again,


That storage box fits great and that tank cover looks great


Works great. Had to install lower due to the stair light but it works great. Best upgrade we’ve done.


I like the tool box but it was little harder to install on my 5th wheel 2011 29SilverBack.I have not used it because of wife still sick,One thing I do not like is the lock is keyed with all the other toolboxes,I would like to change it.


Installation was easy And it fit well into the spot where it was supposed to, It also looks good with the trailer. It's a nice tool kit compartment.


Etrailer is was very prompt in getting it to me. The box is solid. I can see why its rated up to 100 lbs


I am very happy with the quality of this item. The problem that I have is that there were absolutely no installation instructions included in the box. A quick YouTube search found several installation videos for an “ideal” installation circumstance. Unfortunately my Flagstaff 27VRL trailer is not that. For instance… it does not have an I-Beam suspension member on which to fully mount the bracket. Instead I was only able to attach the top of the bracket using the hardware provided. In addition… within the space where the old steps used to fold into is the manual slide out crank attachment. Fortunately I had some spare flat steel straps (3” w x 7” l x 3/16” thick) with which I was able to fashion side braces. It would be nice if Lippert had some resource for advice for unconventional situations. Once installed the box is very sturdy and will hold my power cords and Power EMS.


product looks well made but slight dents and bent from shipping


Removing the old steps and installing this and the fold out steps was the best upgrade yet


Install was straight forward. I had a light for the pull out steps that this box replaced. I should have looked into moving it. As it is the light is blocked by the box. So far after one year the box is holding up well. The price is outrageous as with all RV accessories. Hence the 4 star review. My toy-hauler is lacking on storage space so this was a welcome addition. I store my x-chocks, gloves, and hitch for the bumper pull.


Fit Perfect


Great steps. Very easy to install.


Great look and fir


Unit was not adequately packaged and arrived at my house with the box looking like a bomb exploded in it. The mounting bracket was loose inside the unit with no protection and severely damaged the inside surface finish. Outside surface finish was also damaged due to the lack of packaging. This is the second Lippert product I have ordered that was not packaged adequately for something of its size and weight and both arrived damaged.

Etrailer Expert

Jenny N.


I will have our Customer Service team reach out to you.


After installing Solid Steps on our trailer, I decided to use the extra space for some tools. I installed this where the old steps were. Don't expect to receive any instructions with this product as there are none. I was able to figure out the installation pretty quickly by marking the center of the opening and the center of the mount for the box. On my rig, I had some bolts coming through the frame so I drilled an extra hole in the mount and used the bolt in the frame as part of what held the mount on. The mount is made so you can't install it too high as the box hangs on a set of ears when it's installed. You do have 4 screws inside the box to secure it to the mount so it's pretty solid. I elected to paint the box so it matches the apron of our rig and it looks better than flat black. The box is very useful and well made. I do think it's a little expensive for what you get though, hence only 4 stars.


Great product, works great is original step area of our RV


seems alot smaller than the hole its designed to fill

Show More Reviews

See what our Experts say about this Lippert RV Cargo Carrier

  • Compatibility of SolidStep Locking Storage Box on Trailer With SolidStep Steps from Factory
    The SolidStep Locking RV Storage Box - Powder Coated Steel - 100 lbs # LC664640 can be used on your trailer even if you don't have the space where an old step would be located as long as you are willing to make the cut in your trailer siding if it isn't present. It will mount directly to the frame rail and give you the storage option in that location or really anywhere you want to mount it along the frame.
    view full answer...
  • Can Mounting Lippert Storage Box LC664640 Attach to 2006 Cameo by Carriage
    Yes the SolidStep Locking RV Storage Box # LC664640 can attach to a 6 inch portion of frame like what you have access to on your Cameo.
    view full answer...
  • Depth of Lippert SolidStep Locking RV Storage Box
    Good question; you are right that the SolidStep Locking RV Storage Box - Powder Coated Steel - 100 lbs # LC664640 measures 27 inches long and 11-5/16 inches wide but it also has a large 13-3/4 inch depth, which is a significant amount. The box can carry up to 100 lbs and is lockable to help keep your property safe. I have added a link to the manual as well as a link to a video review and install I recommend checking out of the SolidStep Locking RV Storage Box # LC664640.
    view full answer...
  • Will the SolidStep Locking RV Storage Box Stick Out from the Trailer Sides
    The SolidStep Locking RV Storage Box part # LC664640 is designed to fill the void left over from the old manual pull-down steps when using the fold-up Lippert SolidSteps. The box itself measures 27-1/4" long x 11-5/16" wide which will fit most existing cutouts nicely. I took a look at some of our neighbor's installs and the box does not protrude from the trailer sides in any of these applications, it sits flush or slightly behind on most trailers. Please note, the box does require an I-beam...
    view full answer...
  • Dimensions of SolidStep Locking RV Storage Box
    The SolidStep Locking RV Storage Box, # LC664640 has dimensions of 27-1/4" X 11-5/16" X 13-1/2".
    view full answer...
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  • Will Screen Door and Entry Door Close Normally with SolidSteps in Place?
    When the Lippert # LC791572 steps are properly installed with the threshold plate firmly against the outside threshold you should have no issues. The only thing we hear from customers is how much they love them! While you have your tools out you might as well take down those old stock rattle-trap steps that came stock on your trailer and install the Lippert # LC664640 locking steel box just made to fit in the spot where the steps were. Great spot for black water supplies, or roadside...
    view full answer...
  • Is There A Storage Container Option That Will Go Under The Lippert SolidSteps?
    If you are looking to upgrade the steps on your RV with something like the Lippert SolidStep Manual Fold-Down Steps # LC791573, as an example, there is indeed an option for a storage box that will sit in place of the old steps. This will be dependent on the size of the area however, as the # LC791573 steps will fit a doorway that measures 29" to 36" wide and the SolidStep Locking RV Storage Box # LC664640 measures 27-1/4" long and 11-5/16" deep. With that being said, if you don't mind altering...
    view full answer...
  • SolidStep Manual Fold-Down Steps Leg Adjustment Height
    The SolidStep Manual Fold-Down Steps for 25" to 28-7/8" RV Door Frames - Triple - Aluminum, # LC791572, has adjustable legs that adjust in 1" increments. When drawn fully in the feet can be pulled in approximately 1" from the bottom step. Please note the product review and installation videos that have been linked. A valuable addition to the SolidStep is the, Lippert Entry Assist Handrail for SolidStep, # LC799640. And the SolidStep Locking RV Storage Box - Powder Coated Steel - 100...
    view full answer...
  • Lippert Fold Down Solid Step for 2017 Coachman RL251
    You will need two measurements to pick the perfect fitting Lippert fold down solid steps. First the door way width which is the distance between the narrowest part of the door, usually where the flanges stick out. See the picture on the product page. Second you will need to measure the "Entry Height," which is the height from the threshold at the bottom of the door to the ground. With these two number in hand refer to the chart of the product page. I have attached a copy of it here. For...
    view full answer...
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  • Replacement Hardware and Backing Plate For Lippert SolidStep Fold-Down Steps
    We have the Replacement Hardware and Backer Plate # LC702580 you need for your SolidStep Manual Fold-Down Steps # LC791573. We also have the SolidStep Locking RV Storage Box # LC664640 that will replace folding steps and give you additional storage space.
    view full answer...
  • SolidStep Fold Out Steps For 2013 Coachman Chaparral 5th Wheel
    Since your door way width at the narrowest point is 30” and your entry height is between 35” to 44”, then the Lippert # LC791575 Solid Step is the best fit. With bigger steps you may want to consider a bigger hand rail support. The Stromberg Carlson # AC-530 Folding Handrail is the perfect solution. It is easy to install and is very strong. When you install the SolidStep it will just be natural to remove the old rattle-bang stock steps that came on your trailer. The Lippert # LC664640...
    view full answer...
  • Fold Down Steps For a 2013 Forset River Rockwood Signature Ultra Lite 8281WS
    From my research and experience installing steps on fifth wheel campers your 2013 Forest River Rockwood Signature Ultra Lite Fifth Wheel the door opening should be 30" to 36". If I am correct I recommend SolidStep Manual Fold-Down Steps for 30" to 36" Wide RV Door Frames - Quad - Aluminum Item # LC791575. Most fifth wheel campers sit a little higher. Having the fourth step ensures the bottom step is not too far from the ground. The steps have adjustable legs for un-level terrain so you...
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Info for this part was:

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Edited by:
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Expert Research:
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Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
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Employee Kathleen M
Installed by:
Kathleen M
Employee Jacob H
Installed by:
Jacob H
Employee Zach D
Video by:
Zach D
Employee Jonathan Y
Video by:
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Test Fit:
Shane H
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