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Mount-n-Lock Heavy-Haul'r Standard Duty Replacement RV Bumper - 4.0" - 550 lbs - Black
(38 reviews)
Price: $474.95
Mount-n-Lock
Mount-n-Lock Heavy-Haul'r Standard Duty Replacement RV Bumper - 4.0" - 550 lbs - Black
Part Number: MNT43VR
$474.95
Retail:$543.82
You Save: $68.87
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- Reviews (38)
- Q & A (0)
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Mount-n-Lock Accessories and Parts - MNT43VR
- RV Cargo Carrier
- RV Bumpers
- Bumper Parts
- Mount-n-Lock
Wish your stock RV bumper could support more gear? We do too! That's why we love that this aluminum bumper increases your weight rating so you can throw a few extra bags onto the back of your RV for your long weekend trip to the campground.
Features:
- Standard-duty RV bumper kit increases your weight rating for highway driving
- Great for cargo carriers, bike racks, and other bumper-mounted accessories
- Less likely to lead to bumper detachment than a stock bumper with the same weight
- Roomy, hollow compartment stores your wet, smelly sewer hoses and fittings
- Vented end plates circulate fresh air to prevent moisture and mold build-up
- Rustproof, lightweight aluminum has a sleek, glossy black powder-coat finish
- Bolt-on installation onto your RV's frame with included 10 brackets and hardware
- Some drilling required - does not need any welding or painting
- Optional accessories (sold separately) make it easier to install and use the bumper
- AddaBumper plates help the bumper clear frame obstructions during installation
- SafetyStruts brackets increase the weight capacity for hauling more gear
- Adapter brackets let you mount different sized accessories like a cargo carrier or bike rack
- Made in the USA
Specs:
- Application: I-beam, S-beam, tube, and channel frames
- Flanged frames: must be at least 4" tall x 3" long
- Non-flanged frames: must be at least 3" tall x 3" long
- Overall bumper dimensions: 92" long x 4" wide x 4" tall
- Maximum capacity: 550 lbs when evenly distributed
- Weight: 22 lbs
- Limited lifetime warranty
Worried that your existing steel RV bumper won't be able to support the weight of an extra, larger cooler? Well, you're in luck! This glossy black aluminum bumper is sleeker and stronger than your stock bumper, and it boasts a higher weight rating so you can haul a couple of heavier bags to the campsite. 10 Standard-duty brackets reinforce the bumper, giving you peace of mind that your gear won't detach from your RV on the highway.
Stores Your Sewer Hoses and Fittings
If you don't want to muck up the inside of your RV's cargo compartment, you can use the ventilated storage area inside the bumper to hide your smelly sewer hoses and fittings. The end plates on either side have small, built-in holes that help circulate fresh air to help prevent moisture and mold from building up on your wet hoses. And by keeping your sewer gear in the bumper, you'll free up space in your RV storage compartment for additional camping gear. When it's time to dump your black and gray tanks, slide the end plate up to easily grab your hoses.
10VBK92GB Mount and Lock Heavy Hauler Standard Duty RV Rear Bumper Replacement Kit - 550 lbs - Glossy Black Aluminum
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
- Arrived Damaged
- Wrong item was ordered
Ratings & Reviews
4.5
38 reviews
by:
David
05/08/2026
The Bumper was great.It went on without any problems. I had only two issues. One of the removal end plates is bent and stuck inside the bumper It needs to be damaged further to get it out. The other is that it takes quite a bit of effort to get the blue painters tape off.
by:
Douglas
03/31/2026
I think I need longer brackets. Are the Heavy Duty or Med Duty longer? I need at least 3in longer, to match frame holes in E350 RV frame.
by:
Jesse
08/10/2023
Love the product and the ability to safely handle more cargo such as our 4 bike carrier. My only qualm is if you have a Camco Rhino waste hose you will have to use your old end cover instead of the stock ends that come with the unit. The little screws that hold the metal pieces in place are in the way and the hose will not go in.
Jesse
8/28/2024
Rock solid! I carry 4 bikes, a 35 gallon waste tank and spare tire.
by:
Scott
08/19/2024
Great product and sturdy design. Installation was not straight forward as the instructions suggest, but a lifetime of handy work allowed me to finish.
Scott
8/19/2025
Amazing product, it may cost more, but it would be nice if the trailer manufacturers use these to start with. They know their clients are going be carrying a lot of weight on their bumpers. Great option!!!
by:
Joseph
08/07/2023
Product quality is very good and powder coating was well done. My issue is with the shipment packaging. Although there was an attempt to protect the product in transit it did in fact fail. I recommend the shipper place reinforced cardboard on all four corners from top to bottom and also add reinforced cardboard at each end of the bumper. The shrink wrap was an attempt but didn’t prevent the scratches and dents. After spending nearly $[XX] for the bumper I would say an additional $[XX] spent in proper packaging would eliminate any returns. See pictures.
by:
Sam
09/18/2023
The products I bought came a little earlier than originally stated, and that was great. Unpacking the products was a big pain in the a. However, every thing was in good shape. My main complaint that gives the 4 stars is I ordered a 4 inch bumper to replace my old 4 inch bumper, but with the slide gates on the ends (which looked like a great idea) my 4 inch dump hose won't slide in past the slide gates. Customer service says I'd have to have a 3 inch hose or buy a bigger bumper. That was not an issue I saw while shopping for the bumper. In fact, the little video showed tipping the slide gate to the side and easily sliding the hose inside. Nope! It never said anything about a smaller hose. I'm going to have to take off the screw in the slide gate on one end of the bumper and remove the gate every time I want my hose. I hope it won't bounce out while I am traveling. If it does I'll go back to a rubber cap, rats!
by:
David
08/04/2025
Works great, tested with tow hitch ebike holder.
by:
Andrew
05/24/2023
Fast shipping and great packaging.
by:
David
09/19/2023
It was easy to install with the adapter. Looks great
by:
Lee
04/04/2024
Satisfied & would by again. The original bumper on my 27-foot Freedom Express travel trailer failed when I mounted a lightweight bicycle rack on it. I replaced it with this Heavy-Haul'r bumper. This has worked well. No problem at all now carrying my bicycles. I also use it to carry a equipment rack with an auxiliary generator and gas can. I usually run the generator from the carry rack attached to the Heavy-Haul'r bumper. A bit slow installing with some frame drilling on my camper required but works great once installed.
by:
Edward
08/31/2023
Both products failed with a 4-bike rack rated for RV use the first time I used it.
Brooke M.
9/15/2023
Oh no! I am so sorry to hear that. Do you know the make and model of the bike rack you used?
Brooke M.
9/15/2023
@Edward It looks like the Mount-N-Lock hitch used, part # MNT47FR, was over loaded. The platform of the rack runs from sixteen inches to sixty six inches, putting the center of the load for the carrier platform at forty one inches out, or roughly three and a half feet. The rack itself is probably ninety percent of the one hundred eight pound carrier weight, or ninety seven pounds. So, ninety seven pounds times three and a half feet puts the empty carrier at three hundred forty pound feet, or forty pound feet greater than the rated capacity of the MNT47FR hitch...before the bikes are even added! Unfortunately, the hitch was simply overloaded. If there is a silver lining, at least your rack and bikes werent lost!
by:
Thomas
02/05/2025
Not as easy to install as I thought. Looks great though.
by:
Jeff
04/07/2023
Jeff
4/15/2024
Brackets need to curve up bumper scrapes when pulling into raised driveways etc.
by:
Thomas
07/17/2023
Product arrived quickly, and was packaged extremely well! Installed and SOLID!
by:
Scott
07/20/2023
I received the new bumper right on time.
by:
Ed
09/03/2025
by:
Randall
07/23/2024
Perfect fit on my Lance 1685!
by:
Steven
06/05/2024
by:
Mark
06/04/2025
by:
Rick
04/26/2023
by:
Neil
08/23/2024
by:
Steve
08/23/2026
Exactly as advertised. Materially superior to the original. Professional and competent technical service from Noah. Installation was a breeze. One day project and I can actually use the bumper tube to store the car waste hoses.
by:
Richard
09/29/2026
Very good quality. Not as easy to mount, but it is solid and stronger than original. Finish is very good.
by:
David
09/06/2026
Great product. I used different bolts to attach to the camper.
by:
Kerry
07/27/2026
Went together just as advertised
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See what our Experts say about this Mount-n-Lock Accessories and Parts
- What Do I Need to Replace My Bumper on My 2021 Lance 1475 to Attach a 27 Gallon Waste Water Tank?Hello Michael, Thanks for writing in. You’re not finding a 90 degree bracket because that style of connection isn’t used or recommended for your trailer. The rear wall plate on your Lance is not structural and is not designed to support cargo weight. Trying to tie a bumper into that plate would fail under the kind of load a 27 gallon waste tank creates. The correct solution is to mount the bumper directly to the frame, which is exactly how the Mount n Lock system is designed. For your...
view full answer... - What Is The Difference Between Mount-n-Lock Standard Duty And Heavy Duty Bumpers? Hey Bryce, thanks for reaching out, and good question. The Mount-n-Lock Heavy-Haul’r Heavy Duty 4-inch # MNT43VR is basically the same 4" x 4" bumper as the standard 4.0, but with a stronger mounting setup. You’re not getting a bigger or thicker tube, you’re getting better support through upgraded brackets and mounting options, which helps reduce flex and makes it more usable for slightly heavier loads. It’s still in that “light to moderate duty” category, good for things like bike racks...
view full answer... - Looking For Replacement Bumper For 2011 Coach House Platinum 26 XLHello Dave, thanks for reaching out. We do offer a replacement bumper that may work on your 2011 Coach House Platinum 26 XL. Take a look at the Mount-n-Lock Heavy-Haul'r Replacement RV Bumper # MNT43VR. This is a 4x4 RV bumper that measures 92" long overall. It comes with mounting brackets but you may need the Extension Plates # MO24VR if your frame is shorter than your RV body, or the Drop Plates # MO84VR if your RV's body extends to the bottom of the frame.
view full answer... - Difference Mount-n-Lock Heavy-Haul'r Standard Duty Replacement RV Bumper MNT78VR MNT43VRHey Ed, yes the only difference between the two RV bumper part numbers you mentioned is the finish. The part # MNT78VR is a paintable aluminum finish and the part # MNT43VR is a glossy black finish. This will fit your Forest River and it does come with the needed install hardware.
view full answer... - Towable Replacement Bumper for a 5th Wheel Trailer I wish I could but we do not carry replacement bumpers and none of our RV bumpers are towable. I recommend reaching out to Keystone and seeing what they can offer you or point you in the right direction.
view full answer... - Recommendation For Increasing Strength of Rear Bumper Attached to Spacers Off Of Trailer FrameI do say those welds are bad and it appears the bumper is simply welded onto the back plate of the trailer rather than the frame. I recommend removing the entire bumper for the Mount-n-Lock Heavy-Haul'r Replacement RV Bumper # MNT43VR which you will then be able to add the Extensions # MO24VR. This will allow you to reach your frame and have bolts into the thicker frame material. The Mount-n-Lock SafetyStruts # MO22FR you found will help with the bumper attachment to the spacers the manufacturer...
view full answer...
- Is The Rear Bumper On 2016 Lance 1985 Strong Enough To Support Carrying a Spare Tire? As Lance did not position the spare tire on the rear bumper I would say it is not strong enough to support any additional weight. We do have the Mount-n-Lock Heavy-Haul'r Replacement RV Bumper # MNT43VR which is rated for up to 500lbs and includes a stronger bumper tube and mounting brackets. This will allow you to add the Ultra-Fab Folding Spare Tire Carrier # UF15-954730 along with Cargo Tray # MNT67ZR for additional gear.
view full answer... - Ways To Add a Bike Rack Behind an RV Without a Factory Installed Rear BumperWith your RV not having a rear bumper you will have a couple options and I recommend collaborating with the trailer manufacturer to determine which is going to work best. First and the easiest is going to be installing a Adjustable Width Trailer Hitch Receiver for RVs # 13703. This will allow you to carry a bike rack like the Swagman E-Spec Bike Rack # S94FR in the receiver. Another option which may be the smartest is installing the Mount-n-Lock Heavy-Haul'r Replacement RV Bumper # MNT43VR....
view full answer... - Is There a Hitch Mount Version of the 24x84 etrailer Cargo Carrier for RV BumperI do have some options for you but you'll notice the 24x84 etrailer Cargo Carrier for RV Bumper part # e96ZR has three points of contact which is what allows it to support such a long load. The 24x60 Curt Cargo Carrier for 2" Hitches part # C18151 for example on the other hand only has a single point of contact, therefore you're maxed out at 60" which is about the limit for a hitch mounted cargo carrier. If you don't have a rear square bumper, you can always add one with something like...
view full answer... - Is Curt Bumper Mounted Hitch Receiver Safe to Use on a 2022 Grand Design Imagine XLS Travel TrailerThe Curt RV Bumper 2" Trailer Hitch Receiver # E-100 is a universal hitch fit that can be installed on your 2022 Grand Design Imagine XLS Travel Trailer as long as it has a 4"x4" bumper. While this hitch does have a 350 lb weight rating, if your bumper isn't rated for very much weight then it is still possible to overload your bumper even if you haven't gotten close to the weight rating of the hitch so it's best to check the weight rating for your bumper as well. If the weight of the rack...
view full answer... - Will the Mount-n-Lock Heavy-Haul'r Replacement RV Bumper Fit a 2020 Lance 1685 Travel TrailerYes, the Mount-n-Lock Heavy-Haul'r Replacement RV Bumper # MNT43VR can be mounted on your 2020 Lance 1685 travel trailer. You will need to cut the factory bumper off and mount the included brackets to the extensions off the frame for the factory bumper.
view full answer... - Replacement Bumper Recommendation for a 1998 Grumman Olson TruckThe closest thing we'll have to fitting what your 1998 Grumman Olson needs is a bumper from Mount-n-Lock. I recommend going with a 4" wide option which measures 92" long: - Glossy Black # MNT43VR There are a handful of ways to install these bumpers so I've linked our selection for you to filter through and see if any of them will match with your truck.
view full answer... - Availability of Rubber End Caps for Mount-n-Lock Heavy-Haul'r Replacement RV BumperThe review we have that references this was for the # MNT43VR which is the 4" bumper. Standard endcaps like the # CAM40303 or whatever is on your current bumper would likely fit on the end. The customer in the review reused their old caps from the previous bumper instead of the metal plates. If you're wanting the # MNT63VR which measures 5-5/16" there is no option for alternate endcaps for the bumper. You may be able to get the hose in there since there is additional space compared to...
view full answer... - Best Way to Tow a Trailer and Attach a Motorcycle Carrier to the Same HitchTo tow your Lance trailer and haul a motorcycle carrier off of your F-250's hitch, I recommend the Gen-Y Adjustable 2-Ball Mount w/ Stacked Receivers item # 325-GH-515. This adjustable ball mount has five 2" receiver openings that will allow you to use both a hitch mounted motorcycle rack and tow your trailer. This double ball mount has a 1,500 lbs tongue capacity and a 12,000 lbs towing capacity. If you have a 2-1/2" receiver you will want the Gen-Y Adjustable 2-Ball Mount w/ Stacked...
view full answer... - Can Mount-n-Lock Heavy-Haul'r Replacement RV Bumper # MNT43VR Fit Four Winds 22E Class CYes, the Mount-n-Lock Heavy-Haul'r Replacement RV Bumper # MNT43VR would work for your Four Winds 22E as it was designed to fit standard RV frame styles like what you have. If your frame is shorter (front to back) than the body of your RV you would need he extension part # MO24VR.
view full answer... - Are Mount-n-Lock Heavy Haul'R Bumper Brackets Sold Separately Hey Timothy, The Heavy Haul'R bumper mount brackets unfortunately aren't sold separately so the only way to get them would be to go with the full replacement bumper # MNT43VR.
view full answer... - Replacement Rear Bumper For a 2000 Itasca Spirit on Ford E-350 ChassisIt appears you will be able to replace the factory bumper on your 2000 Itasca Spirit with the Mount-n-Lock Heavy-Haul'r Replacement RV Bumper # MNT43VR. This bumper is 4" square and 92" long. It uses mounts which can be attached to several different frame types. You will want to verify the rear portion of your Ford E-350 chassis has enough material to mount the bumper as this portion is often modified by the camper manufacturer.
view full answer...
Do you have a question about this Accessories and Part?
Info for this part was:
Installed by:
Jeff D
Expert Research:
Jameson C
Written by:
Mary K
Updated by:
Wilson B
Updated by:
Michael B
Edited by:
Amanda M
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Mike L.
4/1/2026
The # MO24VR extension plates would be your best bet, they're 10-11/16 inches long.