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Boat Trailer Deluxe Roller Bunk - 4' Long - 10 Sets of 3 Rollers - by Dutton-Lainson

Boat Trailer Deluxe Roller Bunk - 4' Long - 10 Sets of 3 Rollers - by Dutton-Lainson

Item # DL21740
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DL21740 - 4 Feet Long Dutton-Lainson Boat Trailer Parts
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D-L roller bunks provide a quick, easy, and inexpensive way to upgrade bunk-style trailers to rollers. Call 800-298-8924 to order Dutton-Lainson boat trailer parts part number DL21740 or order online at etrailer.com. Free expert support on all Dutton-Lainson products. Guaranteed Lowest Price and Fastest Shipping for Boat Trailer Deluxe Roller Bunk - 4' Long - 10 Sets of 3 Rollers - by Dutton-Lainson. Boat Trailer Parts reviews from real customers.
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Dutton-Lainson Boat Trailer Parts - DL21740

  • Roller and Bunk Parts
  • Rollers
  • Roller Bunk
  • 4 Feet Long
  • Dutton-Lainson
  • Black Rubber
  • 2500 lbs Capacity

D-L roller bunks provide a quick, easy, and inexpensive way to upgrade bunk-style trailers to rollers.


Features:

  • Non-marking "2 compound" rollers
  • Durable, wear-resistant inner surface
  • Soft, boat-cushioning outer surface
  • Universal mount attaches either vertically or horizontally
  • Optional roller bunk bracket (sold separately)
  • 10 Sets of 3 rollers
  • Constructed of 12-gauge pre-galvanized steel
  • Made in the USA


Specs:

  • Weight capacity: 2,500 lbs
  • Roller assembly width: 4-7/16"
  • Mounting bracket: 1-3/4" wide
  • Mounting holes: 3/8"
  • Quantity: 2 roller bunks


21740 Boat Trailer Deluxe Roller Bunk - 4' Long - 10 Sets of 3 Rollers - by Dutton-Lainson





Video of Boat Trailer Deluxe Roller Bunk - 4' Long - 10 Sets of 3 Rollers - by Dutton-Lainson

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




Video Transcript for Dutton-Lainson Roller Bunks for Boat Trailers Review

Today on our trailer, we're going to take a look at the Dutton-Lainson boat trailer, Deluxe Roller bunk, part number D-L-2-1-7-4-1, and our five foot section, part number D-L-2-1-7-4-0 for our four foot bunk. Here we are with our boat trailer in the water, and we've got the standard boards. To launch our boat, especially when you're doing it by yourself, can be difficult because you've got to push the boat off. I'm in the water and it's not very easy. But with our rollers installed, the boat simply slides off. You almost don't even need to push it in. Also, just as easy as we launch our boat into the water, it's that easy to load the boat back onto the trailer.

Here's what the complete install's going to look like with our roller bunks in place on our trailer. This'll come with two sets of five foot rollers for a total of twelve sets of rollers. Dutton-Lainson also makes a four foot set of bunk rollers. The four foot long ones are one foot shorter than the five-footers here, and they have one less set of the bunk rollers. Now let's go ahead and show you how to install it. To begin our install, we're going to remove the old manufacturer's boards and brackets.

Since we're removing the bunk boards and brackets, we're just going to take the U-bolts off the frame. Quick tech tip. Before you remove your boards, take a tape measure and get the height of your board. That way, when you install your new brackets and rollers, you can set it back to the same height. Now that we have the boards loose we'll go ahead and take them off the trailer and set them aside, as they will not be reinstalled. For our new rollers, we're going to install a new bracket.

This is the Dutton-Lainson universal mounting bracket, part number D-L-2-1-7-4-2. To secure it to the trailer, we're just going to reuse the old manufacturer's U-bolt. Now once that's set in place I'm going to go ahead and tighten it down. Note for additional security, we can add a second set of U-bolts here on the other side. Now here at the center of support, we're going to have two five-foot rollers come in together.

We'll need two brackets, both getting attached to the same spot. To do that, we'll bring in a U-bolt from each side. This will secure our bracket. Now I've got my first one in place, the back side here of the center support. We've got our second U-bolt and support bracket. Now after all our hardware is in place, we'll make sure she's in position, and then tighten down the U-bolts. Keep in mind when tightening down your U-bolts, make sure you tighten them down evenly. Now once we have the center support done, we'll go ahead and install our last bracket here at the very end and repeat the same process we did for the very first bracket. Now with all our brackets secured, we'll go ahead and put our bunk rollers in place. Starting here at the rear set of bunk rollers, we'll set it onto the brackets first. Now supplied with the install kit, you'll need to add a bolt or bolt and washer for this application that'll go down through your bunk roller, then through the bracket. Underneath, I'm going to add a flat washer and nut. It's recommended to use nylon lock nuts. This will help prevent the hardware from loosening. Let's go ahead and install it finger tight this time. Now we've got our front attachment point in place we'll go ahead and do the same process here for the rear attachment point. Next, we're going to install our front bunk and rollers. It'll sit here on our forward and second bracket. But because of how close we are oriented to the rear bunk, we're going to remove the rear set of rollers and we'll need to drill at our attachment point so that we can secure it to the bracket. Let's start with removing the rollers. Using a couple three quarter inch sockets, we can simply just go ahead and remove the bolt that holds the rollers in place pause. I'm just going to slide the rollers back onto my bolt, thread that nut back on. You've got to hold them together while I set them aside. Now we'll go ahead and put our front bunk in place, set it in position on the bracket, and mark the hole. Now we'll take our bunk back off, we turn it over and drill out the hole. Now to drill out the hole, I'm going to use this small pallet bit and then open it up to my final size using the step-bit process. We're now ready to go ahead and put the bunk back in place, drop in our hardware, and secure it. Now with all our hardware in place, we'll go ahead and tighten down all our fasteners. Now with one side done, we'll go ahead and repeat the same process on the other side. There you have it for the review and install of the Dutton-Lainson boat trailer deluxe roller bunk, part number D-L-2-1-7-4-1.


Customer Reviews

Boat Trailer Deluxe Roller Bunk - 4' Long - 10 Sets of 3 Rollers - by Dutton-Lainson - DL21740

Average Customer Rating:  4.9 out of 5 stars   (82 Customer Reviews)

D-L roller bunks provide a quick, easy, and inexpensive way to upgrade bunk-style trailers to rollers.

- DL21740
by:

Received my 4 foot roller bunks in less than a week, ordering was easy, good follow up, and quality looks to be top notch, can't wait to try them out. 917531



- DL21740
by:

Added roller bunks on my bunk boards and now have easiest launching of any boat I have owned. Have to be careful on steeper ramps to be sure we are ready when bow eye is released - will launch without a push! 899813



- DL21740
by:

We only used them once, but they were invaluable. We have an Eco-Harvester that we have to pull out of our lake each autumn. The launch site is very shallow and the harvester weights about 3,600 pounds. In past years we had to try greasing the wood beams it sits on, but it was always a very difficult job. These rollers worked very well and the winch was able to pull the machine out of the water with minimum human effort. I am going to buy two more sections to go on extension beams further into the water and hopefully start lifting the machine earlier. 854579



- DL21740
by:

This has solved a huge problem I was having with launching my boat. My cabin has a shallow launch and the beds on the trailer were not working. It is a great product!!! 821280



- DL21740
by:

will not install for another 15 days or so but product appears to be of high quality....but then have never purchased anything from etrailer that was not well above the norm.... 805944



- DL21740
by:

works exactly as expected. 790818



- DL21740
by:

great price and service. 778461



- DL21740
by:

Impressed with the quality if these bunks. Have yet to put them on but I am pleased with the product. 777324



- DL21740
by:

I was very satisfied with this product. took off old bunks on boat trailer and put on the roller bunks. mounted to the existing brackets. so much nicer. Had the product shipped to my door, Came early the week after ordered. I would definetely order from this company again. 773088



- DL21740
by:

Product, bunk rollers, are exactly what I expected. Will install these on existing 2x6 bunk boards to make it easier to launch or load my 17’ skiff. Product appears to fit nicely and easy bolt-on installation. 747342



- DL21740
by:

Much better quality than I expected! 714287


Comments
Still working great!
Raymond - 10/07/2020

101904

- DL21740
by:

my boat never flew into the water so fast and loading it now could be done by a two year old great product made the loading and unloading of my 17.5 ft. tracker a cinch no matter the water levels thanks 694980



- DL21740
by:

Havent put them on yet . Product sure is heavy duty , pleased with that . Got my moneys worth. Got here on time . Nice to deal with real professionals . thanks Frank Grammo 652578



- DL21740
by:

All the materials I received from E-Trailer were well made and easy to install. It was also easy to navigate the website to find exactly what I needed, and the prices were the best I could find anywhere. I highly recommend etrailer. Before and after pictures of my trailer are enclosed 652466



- DL21740
by:

Great product 650655



- DL21740
by:

High quality material. Works better than expected 640112



- DL21740
by:

I wish these channels were made out of Aluminum due to the fact these bunks are loading a inflatable 10.6 sea eagle. Boy, they are heavy. 610265



- DL21740
by:

Yes sir I received them a day early appreciate everything great product. 598595



- DL21740
by:

I’m in the process of installing them right now. So far it looks like it’s going to be a five star product looks great. I highly recommend this product for boat owners out there 598585



- DL21740
by:

The rollers sure make it easy. I put the boat in the water to make for an easy install. Took about 30min. to install the rollers on the new red wood 2x4's and about an hour to install on the trailer. Didn't even have to start the motor to put the boat on the the trailer unlike the regular carpet bunks. So far that is my only use of the rollers but if it was that easy then it can only be a breeze when I actually use the boat. Putting the two sets of 4's together makes for 2 sets of spare rollers if you ever need them. 589744



- DL21740
by:

I mounted 2 - 4' sections of rollers on each rail of my Lund trailer (8' rails). THe installation was easy - I used lag bolts to mount to mount the rollers to the carpeted bunk rails. My Lund aluminum 16.5' fishing boat rolls off the trailer effortlessly. I needed to have this as my launch is very shallow and my trailer doesn't tilt. I consider this to be a wise addition to my trailer as I couldn't push the boat off the trailer with the old carpeted bunk rails (trailer needed to be fully submerged to get the boat off the trailer) 569054



- DL21740
by:

Fast delivery and high quality product. Seller was in communication through email throughout. 566726



- DL21740
by:

Heavy duty product, easy install, and great working with your staff. Fast delivery. I look forward to working with etrailer.com in the future. thank you. 564009



- DL21740
by:

They look like they will work well and the delivery was fairly quick. 559794



- DL21740
by:

Arrived on time and in good shape. Got a 4fter and 5 fter . Have 9 ft. bunks. Boat goes on and off like glass .Heavyer built than i thought they would be.Sure they will last long time. I will never have to replace them in my life time.. Excellant quality and product.Easy to install.Took longer to realien bunks than to install.Will recommend them to any body and buy them again!! Great prouduct and service!! 544176


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Ask the Experts about this Dutton-Lainson Boat Trailer Parts

  • Can Deluxe Roller Bunks be Used to Replace 4 Wobble Type Rollers on Boat Trailer
    You definitely can replace your current 4 wobble rollers like part # CE29210 with the Boat Trailer Deluxe Roller Bunk # DL21740. These can be mounted on top of carpeted or wooden bunks as well as with brackets like the part # DL21742. I have attached a few photos of how these have been installed on different boat trailers that you can reference.
    view full answer...
  • Does Mounting Roller Bunks on Wood Bunks Lift Boat on Trailer
    Putting roller bunks on top of wooden bunks does raise the height of the boat on the trailer but we have found that you don't need to compensate for that in any other way aside from maybe backing the boat further down the ramp. I'd go with nuts and bolts over lag bolts as they'll be more secure.
    view full answer...
  • Replacement Parts for Dutton Lainson Roller Bunk DL21740
    For the Dutton Lainson Roller Bunk # DL21740 we have replacement roller # DL203228 which will fit roller shaft # CE10700A that includes the two cap nuts. The shaft is 5-1/4-inches long.
    view full answer...
  • How Long of a Bunk Roller to Use on a Boat Trailer
    There is not really a rule for the length of roller bunk needed but a good way to select this would be to match them to the length of your bunk boards. Therefore, you would want to use two sets of the Boat Trailer Deluxe Roller Bunk part # DL21740. These bunk rollers have a 2,500 lb weight capacity. If you need more than you would need to go up a size to the Boat Trailer Deluxe Roller Bunk part # DL21741 which are 5' long and have a 3,000 lb weight capacity. Don't forget the brackets...
    view full answer...
  • Recommendation For Converting Boat Lift Bunks To Roller Bunks
    Roller bunks don't help the water level rise, but they do help with getting a boat on or off a lift. Because your current bunks are 8 foot, you can use 2 sets of the Boat Trailer Deluxe Roller Bunk - 4' Long - 10 Sets of 3 Rollers - by Dutton-Lainson # DL21740 for your 16 foot Crestliner boat. That extra support will only help when using these rollers with your Hewitt boat lift. You will want to be more careful when docking to your lift because the roller bunks will give you a lot...
    view full answer...
  • Compatibility of Aluminum Boat with Roller Bunks on Trailer Instead of Bunk Boards
    The Boat Trailer Deluxe Roller Bunk - 4' Long # DL21740 will be safe to use on your trailer with your 2008 Grizzly Tracker 1860 SC aluminum boat. You can see in the attached video that they are used for and aluminum boat. Damage can only really be caused by user error like overloading a boat while on the trailer. The roller bunks have 3 rollers as opposed to two rollers so the weight will be better distributed and there are rollers every 9.6 inches on center so you will not have...
    view full answer...
  • Can Mounting Brackets On Boat Trailer For Wood Bunks Be Used To Install Roller Bunks
    If the bunk mounts on your boat trailer can be used to bolt through the bottom of the bunk roller like part # DL21740, then you should have no problem using the brackets you have. Most wooden bunk mounting brackets use a bolt that runs through the board when it is placed on end. If you do not want to replace the brackets you can simply replace the wood bunks with pressure treated wood and then mount the roller bunks like part # DL21740 on the top of the board. The DL21740 roller bunks...
    view full answer...
  • Can Wood Bunks Be Replaced with Roller Bunks on Boat Trailer
    Sounds like you are looking for roller bunks to replace the wood bunks you have on your boat trailer. Since it is recommended to use 2 roller bunk brackets for each individual roller bunk, I recommend adding additional roller bunk brackets and removing the wood bunks. You could use the Boat Trailer Roller Bunk Bracket, # DL21742. This bracket is compatible with the 4 foot and 5 foot Dutton Lainson Roller Bunks, # DL21741 and # DL21740.
    view full answer...
  • Recommendation For Replacing Wood Bunks With Roller Bunks On A Boat Trailer For 18 Foot Sea Ray
    Since your current bunks are 8 foot long, I recommend using two sets of 4 foot Dutton-Lainson Deluxe Roller Bunks, Item # DL21740, on each side. I also recommend using 2 roller bunk brackets like the Boat Trailer Roller Bunk Bracket, Item # DL21742, for each individual roller bunks and removing the wood bunks. This bracket fits 4 foot Dutton-Lainson roller bunks. I have attached videos for you to check out.
    view full answer...
  • Bunk Rollers for Boat Trailer Hauling 2002 Bass Tracker
    We do have bunk rollers that are going to work for you though we do not have specific dimensions or parts lists for years, makes and models of boats or trailers. You will simply need the correct length of bunk rollers for your trailer; for example Roller Bunks # DL21740 are 4' long and 4-7/16" wide. They will mount on Roller Bunk Brackets # DL21742. I've added links to video reviews of these parts for you to take a look at.
    view full answer...
  • Roller Bunks Rated for More Than 1,500 lbs
    There are roller bunks for boat trailers rated for over 1,500 lbs; you could use the Dutton-Lainson Boat Trailer Deluxe Roller Bunk # DL21740, which are rated for 2,500 lbs and install with Boat Trailer Roller Bunk Bracket # DL21762. I've attached links to video reviews of the roller bunks for you to take a look at.
    view full answer...
  • How to Install Boat Trailer Roller Bunks on a EZ Loader Boat Trailer
    You can simply mount the Boat Trailer Deluxe Roller Bunk, part # DL21740, by just screwing or bolting it in. The mounting brackets, Boat Trailer Roller Bunk Bracket, part # DL21742, are optional in mounting part # DL21740, and are not required. If you remove your old bunks and installed part # DL21740, the brackets would be needed to attach to the bottom of the bunk where the holes are and there would be no drilling required. This way the bunks would be adjustable to change the height. If...
    view full answer...
  • How Many Roller Bunk Sets and Brackets are Needed for Two 16 Foot Boat Trailer Sections
    For two 16 foot sections on a boat trailer you would need 4 sets of the 4 foot long roller bunks, # DL21740. You would need to use bracket # DL21742. Two brackets are needed for each 4 foot section so you would need 16 brackets total. Since you want to remove the wooden bunks you will need to attach the brackets to the trailer frame.
    view full answer...
  • Bunk Roller Recommendations for a Boat Trailer to Help Boat Load on Trailer
    Upgrading a boat trailer from wood bunks to roller bunks is a very common modification so the part # DL21740 that you referenced should work very well for you. We sell several keel rollers that would work for you. But you would need to first determine what size you need by measuring the length and diameter of your current one and the diameter shank it is designed to fit so that you can follow the link I attached and pick out the correct size replacement. You might go with one slightly...
    view full answer...
  • Adding Roller Bunks to a Boat Trailer to Help Center Boat when Loading onto Trailer
    From the top of a roller to the bottom of the bracket on roller bunks # DL21740 it is approximately 2-7/8 inches. These roller bunk can be attached directly to wooden bunks or you could use brackets # DL21742 which has slotted mounting holes so you can adjust the position of the roller bunks. Two brackets are needed per roller bunk so 4 would be needed for # DL21740. I have linked a video showing an example installation for you.
    view full answer...
  • Adding Roller Bunks to a Boat Trailer with 8 Foot Carpeted Bunks
    What I recommend for you is exactly what you have suggested. Use a total of 2 sets, 1 set of each center bunk, to reach the 8 feet you need. These will secure directly to the tops of the existing bunks. You will not need to replace the bunks. I have included a link to a video review of these bunks for you. The capacity is for a set. So if all the weight was ever on one set of bunks it would exceed the capacity. But since the weight is being dispersed it will not exceed the capacity.
    view full answer...
  • Can Carpeted Bunks be Replaced by Roller Bunks on Boat Trailer?
    You can absolutely replace your carpeted rails with roller bunks on a boat trailer. You are going to need either the 4' Roller Bunks # DL21740 or the 5' Roller Bunks # DL21741 along with the Boat Trailer Roller Bunk Brackets # DL21742, of which you'll need 4 to mount a pair of roller bunks. I've added links to video reviews of these parts for you to take a look at as well.
    view full answer...
  • Roller Bunk Recommendations for 8 Foot Long Bunks
    That depends on how much of the bunks your boat is currently using. If when your boat is loaded on the trailer the hull makes contact with all 8 feet of your bunks then I would go with two 4 foot sections like part # DL21740. If the hull doesn't touch all of it a single 5 foot section would do well, for that part # DL21741. Make sure the weight of your boat does not exceed the capacity of these rollers.
    view full answer...
  • Solution for Loading Boat On Trailer Where Nose of Boat Wants to End Up Below Trailer Winch
    Normally a long keel roller would do the trick to help your boat launch and not end up under the winch. But since you submitted a picture of your boat and there's no good place to install a roller your best option would be to go with a set of roller bunks on your trailer. I would recommend measuring your current bunks and then going with roller bunks that would match your current wood bunk length. The roller bunks will allow you to put the trailer shallow in the water and still be able...
    view full answer...
  • Roller Bunks for Bayliner Boat Trailer with 8-Foot Bunk Boards
    We can help you get your Bayliner's trailer set with roller bunks that will make launching and trailering the boat a whole lot easier for you and your winch. Since you have 8-foot bunk boards now I suggest you install two pairs of 4-foot roller bunks # DL21740 from Dutton-Lainson. These can mount directly to your wooden bunks using your preferred hardware or you can instead use Roller Bunk Brackets # DL21742 (4 per pair of rollers). Our main page for boat trailer parts is linked for...
    view full answer...
  • Dimension Of Rollers On Dutton-Lainson Deluxe 4 Ft Roller Bunks For Boat Trailer
    The rollers on the Dutton-Lainson Deluxe Roller Bunk, part # DL21740 measure 2-1/4 inch diameter and are 1-3/8 inches wide. These wheels are made of a solid core, high grade rubber. These bunks have a weight capacity of 2,500 lbs and come with 2 in a package. If you need a 5 ft section the number is # DL21741. This has 12 sets of 3 rollers and have the same roller dimensions. These roller bunks have a weight capacity rating of 3,000 lbs. If roller bunk brackets are needed, I recommend...
    view full answer...
  • How Many Bolts are Used to Install Roller Bunks
    A minimum of two bolts will need to be used to install each Dutton-Lainson Roller bunk part # DL21740 . You can also use the Roller Bunk Brackets # DL21742 to install the bunks. A pair of these are required to install each bunk.
    view full answer...
  • Roller Bunk and Bunk Bracket Recommendation for a Boat with Changing Angle Hull
    Since your current bunks have a bit of a curve to then I would recommend using the bunk roller brackets part # DL21742 instead of mounting the # DL21740 directly to your wood bunks. These brackets will allow the rollers to swivel and match the angle of your hull. If you mean that your bunks curve up then roller bunks would not be our best option as there is no way to bend them. Other than that your plan sounds good. Since the # DL21740 is sold in pairs you would only need to order...
    view full answer...
  • Best Roller Bunks for a 12 Foot Klamath Aluminum V-Boat on a Tilt Boat Trailer
    An aluminum boat is not going to weigh as much as some other forms of construction so the 2,500 pound capacity of roller bunks # DL21740 is probably going to be enough. But if higher capacity is needed go with the longer 5 foot set, # DL21741 which have a 3,000 pound capacity. Length is also a factor. You want roller bunks anywhere the boat rests on the trailer. Having rollers the appropriate length better disperses the weight of the boat. You can get more than one set and cut to length...
    view full answer...
  • Connecting Bunk Rollers to Form a 10' Roller on my Boat Trailer
    We have a great solution for you. Using the Boat Trailer Roller Bunk Bracket for Dutton-Lainson Roller Bunks part # DL21762 and two of the Dutton-Lainson Boat Trailer Deluxe Roller Bunk 5' part # DL21741 you will be able to get the 10' roller bunks you are looking for. These are also available in 4 foot sections as part # DL21740. Some of the factory bunk brackets are welded on and some are bolted on if they are bolted on simply take off the single middle and replace it with two of the...
    view full answer...
  • What is the Quantity of Roller Bunks in Dutton-Lainson Boat Trailer Deluxe Roller Bunk # DL21740
    The Dutton-Lainson Boat Trailer Deluxe Roller Bunk, part # DL21740, will contain a pair of 4-foot long roller bunks. Each roller bunk will contain 5 sets of three rollers. This part number will have 2 roller bunks for a total of 10 sets of three rollers. We also have the Dutton-Lainson Boat Trailer Roller Bunk Bracket, part # DL21742, that is used for mounting the roller bunks to your trailer. This part number is for one roller bunk bracket, so four would be needed to mount a pair...
    view full answer...
  • Can Roller Bunks be Used on a Pontoon Boat Trailer
    You could use roller bunks such as # DL21740 on a pontoon boat trailer. If the pontoons sit on carpeted bunks and support the boat then you would need to place rollers the whole length of each of the carpeted bunks. Set # DL21741 is rated higher at 3,000 pounds per set and longer at 5 feet so I recommend going with these over the 4 foot long option. If the boat is actually supported by the hull then you would need roller bunks placed everywhere the boat makes contact with the trailer....
    view full answer...
  • Do All Bunk Rollers Assemblies Have Pre-Drilled Mounting Holes
    I went out to the warehouse and pulled a set of Dutton-Lainson Boat Trailer Deluxe Roller Bunk # DL21740 and, yes, both roller assemblies have pre-drilled mounting holes on the bottom so you will not have to do any drilling. No hardware is included with this part. To install the roller bunks to your trailer, you may be interested in the Dutton-Lainson roller bunk bracket, part # DL21742. These brackets will have to be installed at the correct angle for your boat hull as they are stationery.
    view full answer...

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Info for this part was:

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