With a little trailer modification that only took about an hour, so far they look and work great.
I did not use the product for converting a bunk trailer, although it would be an easy conversion.
If you wish to remove the bunks you currently have you could use a bracket like part # DL21762 to attach the roller bunks directly to the trailer frame. You can see current pricing information by using the provided link that will take you to the product description page. This 12 inch Hot-Dipped Galvanized Roller Bracket is designed to fit 12 inch Keel or Straight Rollers . I needed to replace the rollers on my jet ski trailer, but I had to replace them with rubber ones as the ones on my trailer were hard plastic and were rubbing away the finish on my ski.
We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information. We love helping people.We have the most highly trained customer service, hands-on experience, step by step videos and installation instructions. Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. We provide one-on-one, personalized service from the ordering process through the life of your product. We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service. You may also be interested in Boat Trailer Roller Bunk Bracket, part # DL21742, for mounting the roller bunks. I checked out some photos of the 19 foot Carolina Skiffs online and found that the bunks are normally made from what looks like 2x4 lumber laid flat. If you remove your old bunks and installed part # DL21741, the brackets would be needed to attach to the bottom of the bunk where the holes are and there would be no drilling required. You will also want to make sure that the roller bunks will be able to handle the weight capacity of your 18 foot boat.
I would recommend stainless steel mounting screws, available at a local hardware store, to attach the roller bunks to your wooden bunks. If you wanted to remove the wooden bunks, you would need to use the Boat Trailer Roller Bunk Brackets, item # DL21742, to install the roller bunks on.
For 5 ft bunks, you would need part # CE27820, for 4 ft bunks, part # CE27810, and for 3 ft bunks you would need part # CE27800. For a comparable galvanized product, I would recommend part # DL21741, with each 5 foot section having a 3000 lb capacity per pair of rollers.
I would mount them down the middle of the bunks and if you used two sets of the # DL21740 there would be rollers from front to back on your bunks. Now also, if you wanted to remove the wooden bunks on your trailer, you can use the optional roller bunk bracket which is part number DL21762 and thats what installs if you remove your wooden roller bunks.

The combined weight capacity of these two bunk rollers is 2500 pound boat capacity, weight capacity.
With the Dutton-Lainson roller bunks we offer, you can also get Boat Trailer Roller Bunk Bracket for Dutton-Lainson Roller Bunks, # DL21762, for the pivoting black steel roller bunks, or # DL21742, for the galvanized.
If your bunks are turned so that the side of the bunk is in contact with the boat's hull, use the # DL21741 rollers, which would bolt directly to the long side of a 2 x 4 trailer bunk. We use these in a manufacturing process to move 80 lb arbors from one production machine to another and they are ideal for the task. Our modern installation facilities allow our expert installers and customer service representatives to actually install and use the items we sell, so you can get real advice, from a real person who has the knowledge and expertise needed to solve your problem.
We are prepared to answer any question, give advice, or troubleshoot any problem you come across.
Since we're removing the bunk boards and brackets we just going to take the u-bolts off the frame.
Used these on a boat I sold and then just bought 4 to set up my buddies boat with roller bunks. You will have to install these at the correct angle for your boat hull as they are stationery.
Carolina Skiff Boat TrailerYou should not have any problems using 2 sets of the Deluxe Roller Bunks end to end on the bunks on your trailer. If you have standard 2 x 4 bunks, I recommend the Boat Trailer Standard Roller Bunk, # DL21755. The rollers would cause less friction between the boat and the bunks, therefore requiring considerably less effort to winch the boat up onto the trailer.
These Dutton-Lainson Roller Bunks will provide a quick, easy and inexpensive way to upgrade your bunk-style trailers to rollers.
These brackets allow the roller bunks to be adjusted vertically from the trailer and angled to cradle the boat hull.
My contact at Dutton-Lainson advised that the choice of nuts and bolts versus screws is not critical so long as the rollers are firmly secured. Granted, a PWC isn't likely to weigh more than 1000 lbs, probably less but because the rollers weren't tested without bunk boards it would be impossible to say how much their capacity would be reduced.
The diameter is also 3 inches and this roller is designed to fit on a 3 inch wide bracket that will use a half inch diameter shaft. Guaranteed Lowest Price and Fastest Shipping for Boat Trailer Roller Bunk Bracket for Dutton-Lainson Roller Bunks Parts DL21740 & DL21741. Quick check tip, before you remove your board take a tape measure and get the height of your board.
The Boat Trailer Deluxe Roller Bunk, part # DL21741, has a universal mount system that attaches directly to either vertical or horizontal positioned bunk boards that should work on your trailer. This particular bunk system can be mounted directly to your current bunks if they are in good condition. The kit comes with everything you need to install a set of the guide rollers on your boat trailer.

They feature a special non-marking roller with a durable wear-resistant inner surface and a soft boat cushioning outer surfaced. Comes with two rollers and theres five sets for each four foot length so thatd be 10 rollers on each one. If you wanted a set of roller bunks for this bracket I would recommend the Boat Trailer Standard Roller Bunk # DL21754. At 4 foot long, they'd probably offer plenty of support, but I'd recommend getting a set that's close in length to your existing bunk boards. So for example if you needed a 9 foot section you could get 2 of the 5 foot models and cut off 12 inches of one to get 9 feet. That way when you install your new brackets and rollers you can set it back to the same height.
The mounting brackets, Boat Trailer Roller Bunk Bracket, part # DL21742, are optional in mounting part # DL21741, and are not required. However, it is recommended to remove your existing carpeting on your bunks before installing these rolling bunks. This roller will replace the worn out bow roller on your boat trailer it does help in loading and unloading of the boat and it does support the front of the boat as it sits on the trailer.
Now once we have the center support done we'll go ahead and install our last bracket here at the very end. The rollers would simply mount right over the edge of your existing bunk boards, but you'll probably need to remove the carpet from them first. Now for our new Rollers we're going to install a new bracket to secure it to the trailer.
Each post has a total height of 21 inches and they can adjust up to 13 inches out from the frame on each side. You can mount them above or below your trailer frame to reach the exact height that you need.
To drill out the hole I'm going to use this small poly bit and then open it up to my final size using the step bit process. The guide posts are galvanized while the mounting u-bolts are zinc plated to help keep rust from forming.
We now ready to go ahead and put the bunk back in place, drop in our hardware and secure it. This roller style of bunk guide allows your boat to be easily directed up onto your trailer without resistance or damage to your boats hull.

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