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  1. Trailer Door Parts
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  3. Transition Plates
  4. 81 Inch Wide
  5. Aluminum
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Enclosed Trailer Transition Plate - 81-3/4" Long - Aluminum - Qty 1
M-3 and Associates

Enclosed Trailer Transition Plate - 81-3/4" Long - Aluminum - Qty 1

Part Number: M348FR
In Stock
$489.23
Retail:$515.83
You Save: $26.60
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You're tired of wrestling heavy carts and wheeled gear into your trailer. This aluminum transition plate bridges the gap at the ramp, smoothing the path from ground to floor so loading is faster, safer, and way less frustrating. Great Prices for the best trailer door parts from M-3 and Associates. Enclosed Trailer Transition Plate - 81-3/4" Long - Aluminum - Qty 1 part number M348FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (12)
  • Q & A (0)
  • Photos

M-3 and Associates Trailer Door Parts - M348FR

  • Transition Plates
  • 81 Inch Wide
  • Aluminum
  • Bolt-On
  • M-3 and Associates

You're tired of wrestling heavy carts and wheeled gear into your trailer. This aluminum transition plate bridges the gap at the ramp, smoothing the path from ground to floor so loading is faster, safer, and way less frustrating.


Highlights

  • Roll With Ease: Covers the gap at the ramp so wheeled gear moves smoothly into your trailer.
  • Protects Your Wheels: Keeps casters from dropping into gaps that can jam or damage cargo.
  • Strong and Welded: Fully welded aluminum plate with pocket-welded piano hinge for strength.
  • Cut to Fit: Piano hinge design lets you trim the plate to match your trailer width.
  • Non-Slip Surface: Treadplate pattern gives your wheels and boots extra grip.
  • Made to Last: Rustproof aluminum handles heavy loads without bending or wearing down.

Specs

Dimensions:

  • Overall width: 81-3/4"
  • Thickness: 3/16"

Weight:

  • 23 lbs

Construction:

  • Welded aluminum with piano hinge
  • Treadplate surface


9500052-ET M-3 and Associates Enclosed Trailer Transition Plate - 81-3/4" Long - Aluminum - Qty 1





Customer Satisfaction Score:

Ratings & Reviews

4.8

12 reviews
Review sort icon
You're tired of wrestling heavy carts and wheeled gear into your trailer. This aluminum transition plate bridges the gap at the ramp, smoothing the path from ground to floor so loading is faster, safer, and way less frustrating.

by:

Easy install and seems sturdy.



by:

The entry pad falls off due to the adhesive on the back gives way. When I open my trailer door, I find the center piece on the floor of my trailer, so I pick it up and put it back where it belongs. No matter how much or many times I put it back it comes off. So now I fold up a couple of towels and put it between the pad and the trailer door so it doesn’t fall off. The only thing holding the sides are the center plate. Which if it wasn’t there, I’m sure it too would fall off. Other than that it works as it said it would.



by:

Super heavy duty and easy to install.



by:

FANTASTIC!!!!!! That’s really all that needs to be said about this transition plate, but that really wouldn’t be much of a review now would it. I just installed the transition plate on my trailer and the installation process is very simple and straightforward. The quality of this transition plate is top notch. In my opinion, this is the best option on the market for a transition plate of this quality! I only use my trailer to haul a John Deere riding mower and a motorcycle from time to time and this plate makes it so much easier to load and unload both of them. There was no flex in the plate at all loading either one of them. Just keep in mind that this is made of solid steel, so yes it is going to add a little bit of weight to the rear door of the trailer and it is noticeable when lowering and raising the door. Shipping was extremely fast. I was actually surprised how fast it was shipped. Great job etrailer!!!



by:

I own a luxury mobile Teppanyaki private chef company we use custom NSF commercial wolf griddles for cooking. I’m talking about over 500 lbs of weight each grill. This trailer plate was one of the best purchases I’ve made for my trailer. Although is heavy in weight, it’s heavy duty and can handle the weight of our equipment. Install was very simple. I think it took me less than 60 minutes to install by myself. An experienced person would install under 30 minutes. A happy customer.



by:

We have these on most of our box trailers.
Great product!



by:

The only reason for 4 stars is I followed the instructions down to the letter, and by doing that, the transition plate flexes a little bit in the middle of the plate and gets hung up on the trailer door when trying to flip it back over to close the door, looks like I need to move the transition plate up about 1/2 inch to avoid hang ups with the plate. Plate seems to really well made.



by:

Got the items super quick. Don't know why I waited to get these for my trailer. As a DJ I have hated having to lift my carts up over the lip of the ramp. These went together very easily and had both installed in about half an hour. Looking forward to using these soon on my next event.Photos show installed and ramp up.



by:

Easy to install and very durable. We are a portable church based in south alabama and currently load and unload equipment every weekend. We have a 28ft and 26ft trailer and about to purchase a second one.



by:

I had a great experience with ordering transition plates for my trailer. Shortly after ordering, I was promptly notified about the status of my order by Brandon with etrailer. What I like most about the plate is that it is well-built with solid metal materials which will help with safely loading and unloading heavy items.



by:

The ramp is built very well, super strong for rolling motorcycles / tool boxes or just about anything into the cargo trailer. the only issue I did not account for is the extra weight the door has now because of the ramp, it will require more strength to close the door. (FYI)
So if you want the best ramp for your trailer I highly recommend buying this product. Install is straight forward just line it up and screw it on to the trailer ramp and done.



by:

This ramp came exactly as advertised. It arrived in 2 days, which I did not expect and only took 30 minutes to install. It is made of heavy duty steal that I drive my 26" floor scrubber over. It does not show any sign of struggling to handle the weight.

I will be buying more of these for my other work trailers.



by:

the transition plate from door to ground installed and works great problem is the cover plate from trailer floor to door not working at all turned the bolts over close to the hinge and still have a 1 inch gap from the plate to door. Not a good fit at all.



by:

Works perfectly and handles all the heavy stuff we wheel in and out of our trailer without any hickups or snags with smaller wheels or rough terrain.



by:

Excellent material!! Handles my needs perfectly! I have gone over it with more weight and no problem. I would absolutely recommend it's purchase, matter of fact I may buy a second one for the inside lip of trailer as this one is at ramp doors edge to ground contact. No wood conversions compares to this, especially after a hard days work in the rain.



by:

Looks like a good product. Instruction's could be better show/state how far away from edge to mount ramp/brackets on the rear. Straight out of the box the tread tape is already peeling off and not sticking to the metal. I will see if I can get another type of sealant to work and hold it down. Would be better with raptor liner or something else vs the peeling tread tape. The rest of my trailer is Raptor lined so might do it on this ramp as well.



by:

So far I like them a lot. I bought them for my event/ sales trailer for my business. I have run 1100lbs tool boxes and 800lbs tire machines across them and they are working well. Very happy so far.



by:

Transition plate works great. Easy to size and install. It’s obviously a lot heavier than the stock plywood transition but that alright it’s solid. I’m happy with the purchase



by:

So far so good. I installed this flap at the bottom of the ramp. We use this trailer for Commercial Moving services and rolling 4 wheel Dollie’s up and down the ramp is very easy with this flap. Took all of 10 minutes to install, definitely recommend.



by:

Super easy installation, high quality tread and heavy duty plates. The only thing I don't love is that it doesn't lay flat over the transition. I put some plastic spacers under the hinges and drilled out holes for the nuts and hinge rivets to help alleviate this. Perhaps raising the tongue more would help also.



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by:

If you are tired of lifting heavy gear into your enclosed trailer, this aluminum transition plate from M-3 and Associates is a simple fix that makes loading way easier. It is over 81 inches wide, so it fits most trailer openings, and the design lets you roll heavy items straight from the ground onto your trailer floor without worrying about wheels getting caught in gaps. Whether you're hauling mowers, carts, or toolboxes, this saves a lot of strain on your back. The piano hinge makes for a smooth tilt and allows you to cut the plate to fit if you need to shorten it up. The diamond tread pattern gives you extra grip, which helps when you're loading in wet or muddy conditions. The plate itself is made of durable aluminum that won't rust, and it is fully welded, including the hinge pockets, so you are getting something built to last. It is 3/16 of an inch thick and weighs about 23 pounds, so it is strong without being a pain to handle during install. This is a solid option whether you're replacing a worn-out plate or adding one for the first time. For a quick upgrade that adds safety and saves time, this enclosed trailer transition plate is hard to beat.



by:

The quality of parts and fast shipping is top notch

Christopher H. profile picture
Etrailer Expert

Christopher H.

9/17/2026

Glad we could help Chuck! Really appreciate you including the photo.



by:

This transition plate (t-plate) is a heavier gauge than one provided in an earlier cargo trailer. The stamped pattern provides better footing, too. Though a t-plate isn't necessary for hauling cars, we all know that enclosed trailers haul more furniture that anything else! The t-plate gives workers and wheeled-dollies a smooth ingress and egress from the trailer.
Installation was elementary. I used self-tapping #10 x 1.25" stainless steel screws. The panhead screws in my floor's aluminum end cover were removed for a flush mount against the end cover. The t-plate does have sharp corners which I recommend be rounded just a bit with a small grinder, like a Dremel, to avoid scrapes while strapping down a car.
Yes, the price is excruciating. It's one of those deals: they have it, we want it.


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See what our Experts say about this M-3 and Associates Trailer Door Parts

  • Plate For Trailer Ramp Edge And Gap Between Floor And Ramp To Allow Wheels To Roll Without Catching
    Great idea, Leo - we don’t package the M-3 plates as a set, but you can just grab two of whichever version you prefer. Many folks use the steel plate # M368FR for the exterior edge where it takes more impact and the aluminum plate # M348FR for the inside gap since it’s lighter to lift with the door, but you can use whichever is better for you. What’s the trailer used for, Leo?
    view full answer...
  • Do Enclosed Trailer Transition Plates Come With Hardware? What Bolts Do I Use?
    Hey Corey, good catch - hardware isn’t included with either the # M368FR steel or # M348FR aluminum plates. Most folks just source stainless or zinc-coated hardware locally so they can match what’s already on their ramp. It also depends on the style and thickness of the ramp, so that's why hardware isn't always going to be universal. Pre-drilled holes are already there, so install’s pretty quick once you line it up. I'd use a standard cordless drill or impact which would zip the screws...
    view full answer...
  • Plate To Roll Fridge Cart Into 5x10 Concession Trailer With Big Drop Off On Ramp Door edge
    Definitely, Renee - either one will fix that gap. For your size trailer, I’d go with the aluminum transition plate # M348FR since it’s lighter and plenty strong for equipment like that. It gives you a nice 14 inch transition area. Are you planning to mount it inside the trailer or at the outer ramp edge? That’ll affect where you line up the hinge. One thing I noticed is that the plate might be too big for your 5 foot wide trailer. You may need to trim the aluminum, so if you're okay with...
    view full answer...
  • Will Aluminum Transition Plate Bend On Enclosed Trailer When Loading Heavy Zero Turn Mower?
    Good question, Tina - you’re in the safe zone with the M-3 aluminum plate # M348FR. It’s 3/16 inch thick and fully welded across the piano hinge (some cheaper ones are just bolted instead of welded), so even with heavy mowers or small tractors, it won’t flex or deform unless you go crazy with a very heavy tractor or something like that. Only a portion of the mower’s weight ever sits on the hinge at a time, so you’re well within what this can handle. It technically doesn't have a weight...
    view full answer...
  • Transition Plate For 7x16 Enclosed Trailer To Roll Carts Over Ramp Door Where It Gets Hung Up
    Hey Jeff! Yes, the M-3 steel plate # M368FR is perfect for that setup. It’s about 81-3/4 inch wide, so it’ll span your ramp nicely, and the welded steel with a tread-plate texture gives great traction even if your wheels are wet or muddy. You’ll just bolt it to the bottom edge of the door and it folds down with the ramp for a smooth roll-on. If you want something a little lighter but still sturdy, the aluminum version # M348FR does the same job at about half the weight. If you're in extreme...
    view full answer...
  • Plate To Allow Rolling Over Lip Of Trailer Ramp Door - Rustproof Aluminum
    I hear you, Matt - that lip is the worst when you’re rolling heavy things over it. Go with the aluminum M-3 plate # M348FR. It’s rustproof, only about 23 lbs, and has a strong tread pattern so that it’s grippy even when it’s slick outside. You’ll never have to paint or touch it up since it's aluminum and not painted steel. What width is your ramp? This plate is 81-3/4" wide, but it can be trimmed to smaller width if you really needed to. Where are you based? If you’re in a coastal or...
    view full answer...
  • Is There A Transition Plate For Car Hauler Ramp That Has 2" Tall Lip At The End Of Ramp?
    Yep, that’ll still work fine, Joe. Both the Steel # M368FR and the Aluminum # M348FR transition plates are bolt-on and can go on an open trailer - just use through-bolts since you’re mounting into steel. It’ll smooth out that 2-inch lip perfectly and keep smaller tires or casters from hanging up. What kind of car are you loading? That’ll help confirm if you need the steel one for the extra weight.
    view full answer...
  • Can Aluminum Transition Plate Be Bolted To Toy Hauler's Steel Ramp?
    Hey Sheila - you can bolt the # M348FR aluminum plate right to your ramp, no spacers needed. Just make sure to use stainless hardware to prevent galvanic corrosion between the aluminum and steel surfaces. I'd also recommend throwing some rust-preventive paint on the steel and hardware parts when putting the plate on your steel ramp. What type of trailer is it, and what do you normally haul? This will definitely help prevent things from getting caught on the ramp door edge/lip and prevent...
    view full answer...
  • Transition Plates For Trailer Ramp Door That Is 80-1/2" Wide
    Hey Dylan - both M-3 plates measure 81-3/4 inches wide, so you'd need to trim off a little bit. The aluminum one # M348FR would be easier to trim, so I'd pick that over the steel one. The hinge runs the full width so you’ll still get solid support. If you don't want to trim, and you think 7 feet (72") would be enough length, I'd instead go with the Caliber Edge Glide transition plate # CA97EJ which is heavy duty plastic and would work well for you. It's also very lightweight and easy to...
    view full answer...
  • Steel Transition Plate For Rolling Pallet Jack Over Gap On Trailer Door Ramp
    Hey there Mike; both M-3 plates are built heavy duty, but they don't really have a weight rating. They use a 3/16 inch thick tread plate and come in steel # M386FR or aluminum # M348FR, fully welded with a piano hinge. They’ll take the full load of a pallet jack or rolling toolbox without bending, and the hinge keeps everything smooth. If you’re loading pallets often, I’d lean toward the steel # M368FR for that extra stiffness. What kind of loads are you typically moving?
    view full answer...
  • Steel VS Aluminum Transition Plate For 7x12 Enclosed Trailer
    Good question, Patrick - both do the same job, but here are some differences for you to look at. The # M368FR steel is heavier at 40 lbs and better for constant heavy loads like pallet jacks or commercial carts. The # M348FR aluminum is lighter at 23 lbs and rustproof, great if you’re dealing with rain, mud, or coastal air. So, if you’re mostly loading dirtbikes and yard gear, I’d go aluminum. What kind of climate are you in?
    view full answer...
  • Transition Plate To Bridge 3" Gap On Wells Cargo Motorcycle Trailer
    Hey Brandon! Yes, either M-3 transition plate (steel # M368FR or aluminum # M348FR) will do the job, but I’d go aluminum # M348FR since it’s easier to trim and won’t rust if water gets in that recessed area. Just mount it across the lower edge of the door and let the hinge float over that 3-inch. If you were hauling heavier equipment, I'd lean towards the steel for a little more reinforcement, but the aluminum is plenty strong for your setup. What type of motorcycles do you have? I always...
    view full answer...
  • Can the M-3 Transition Plate Be Installed from the Trailer Floor to the Ramp Door?
    Hi Andrew, The M-3 Enclosed Trailer Transition Plate part # M348FR is not intended to be installed on the ground, so I don't recommend using it for that purpose. For installing it from the ramp to the trailer floor, it is possible to have a transition plate installed to go from the trailer floor to the ramp door to help move things over the gap between the ramp and floor. I've attached a photo showing someone who's done just that, one from the ramp to the ground and another from the...
    view full answer...
  • Can M3 Enclosed Trailer Transition Plate Be Trimmed To Fit 6-1/2 Foot Wide Ramp Door?
    Good question, Chris - yes, both M-3 plates are designed so you can cut them down. Just trim from the outer edge and if you’re using the steel # M368FR, touch up the cut edge with paint to keep it sealed. The aluminum # M348FR doesn’t need that since it won’t rust. Do you already know your door width?
    view full answer...

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Info for this part was:

Employee Steven C
Installed by:
Steven C
Employee Anthony G
Edited by:
Anthony G
Employee Kim H
Written by:
Kim H

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