Universal Roller Brackets for Boat Trailers

Part Number: MBSPB

In Stock

$19.77

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

redline boat trailer parts rollers roller bracket

redline boat trailer parts roller bracket mbspb

redline boat trailer parts roller bracket

redline boat trailer parts rollers roller bracket universal brackets for trailers

redline boat trailer parts rollers universal roller brackets for trailers

Show All (7) Product Images

Show Fewer Product Images

Customer Photos

Universal Roller Brackets for Boat Trailers customer photo

Show All (1) Customer Images

Show Fewer Customer Images

Videos

All You Need to Know About the Universal Roller Brackets for Boat Trailers

Show All (1) Videos

Show Fewer Videos

Need help with installation?

Locate installers near me

1-800-940-8924 to order Redline boat trailer parts part number MBSPB or order online at etrailer.com. Free expert support on all Redline products. Great prices and Fastest Shipping for Universal Roller Brackets for Boat Trailers. Boat Trailer Parts reviews from real customers.

Redline Boat Trailer Parts - MBSPB

Universal Roller Brackets will accommodate any size roller length. Brackets feature a 5" slot, which allow vertical adjustment for stabilizing boat on trailer. Galvanized to protect against corrosion.

Uses 5/8" Roller Shaft and Pal Nuts
Includes left hand and right hand brackets

400L and 400R Redline Marine Roller Brackets

MBSPB Universal Roller Brackets for Boat Trailers

Video of Universal Roller Brackets for Boat Trailers

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

Video Demo Redline Boat Trailer Parts MBSPB

All You Need to Know About the Universal Roller Brackets for Boat Trailers

Video Transcript for All You Need to Know About the Universal Roller Brackets for Boat Trailers

Today we're going to be taking a look at the Universal Roller Brackets for Boat Trailers. These split panel brackets mount upright to a trailer's crossmember. They support a keel roller, or a spool roller, to help keep the boat moving while it's being loaded and to stabilize the keel. You do get both the right and left hand brackets that support a roller on your boat trailer. They'll fit any length roller that has a 5/8 inch diameter shaft. Really nice sturdy galvanized steel construction that's going to do a great job at resisting rust, and corrosion, and lasting a long time.

The units are going to feature the slotted mounting holes that allow you to adjust the position during installation. Again, it's going to fit a variety of lengths of rollers. It'll fit a 4 inch, 5 inch, 8 inch, 10 inch, 12 inch, and 18 inch long rollers. Just keep in mind that it's going to require a 5/8 inch diameter roller shaft. When it comes to the dimensions of the mounting slots, those are going to measure a half inch wide x 5 inches long. This area right here measures pretty close to 6 inches, maybe 6 1/8 x about 1 7/8 to 2 inches, going in that direction.

That's going to do it for today's look at the Universal Roller Brackets for Boat Trailers.

4.5

34 reviews

5 Stars		(27)
4 Stars		(3)
3 Stars		(1)
2 Stars		(1)
1 Star		(2)

by: James 12/12/2025

Brackets are heafty,just what I need.

by: DALE B. 06/02/2015

I CONVERTED AN ALUMINUM UTV TRAILER TO HAUL MY UTV OR MY FISHING BOAT WHICHEVER I WANT TO USE .THE ITEMS ROLLERS,BRACKETS,ETC I ORDERED FROM E-TRAILER WORKED PERFECTLY. I WAS KEPT INFORMED ON THE STATUS OF MY ORDER AND THE ORDER CAME VERY QUICKLY AND WAS OF EXCELLENT QUALITY,VERY PLEASED WITH THE SERVICE AND PARTS,THANKS GEORGE

Dale B. One Year Later

6/1/2016

very pleased ,everything working flawlessly, thanks again

by: Charles 12/01/2022

fast shipping item is exactly as discribed on web site. would order from them again.

Charles One Year Later

12/2/2023

The product is just as good as it was the day I received it and it is working great

by: Bruce 11/18/2024

This is the second time that the same ones were sent to me. They are either both rights or both lefts. I need a pair to make this work. Please send me a PAIR of brackets. Have someone else pack them please. This really messes up my plans.

Click to Enlarge

Brooke M.

11/26/2024

I am so sorry to hear that Bruce. I have already started looking into this to get you the correct parts out the door ASAP.

by: Marvin 11/09/2018

Exactly what I needed to mount my rollers to the cross beam of my trailer. Perfect and quick delivery from etrailer. Good galvanized coating and solid heavy duty brackets which are well gusseted for strength.

by: Charles 10/24/2018

Great quality product will last for years. Quick shipping. Easy to install. Amazing customer service.

by: Gary 05/27/2021

I have used these type brackets before, so I know what to expect. Do appreciate the speedy processing and delivery. Still waiting on some items from big box stores. Kudo's to etrailer.

by: William 02/07/2020

Exactly as Advertised, and the best deal by far than i could get any where else. Highly recommend etrailer. Thanks

by: Spike 02/02/2024 One Year Later

They have held up well in fresh water only environment.

by: Bill B. 04/29/2019 One Year Later

Worked as advertised and functioned well for my application.

by: David 03/12/2020

I couldn't believe how quick the order came. Excellent condition and great quality parts. Thanks you etrailer.

by: Fred 01/12/2023

Your service was great these clowns delivering it suck i did not get it.. could u please send me the tracking number

by: Robert 01/06/2023

quick shipping

by: D. 09/30/2021

Website easy to navigate,just got the product and haven't installed or tried it out yet. Shipped & received in a timely manner.

by: Mary 08/25/2011

thin bargain-basement junk. I was extremely surprised that the high quality products sent and how fast they arrived.

by: Michael 10/12/2021 One Year Later

These worked out perfectly

by: Rich B 04/27/2012

needed so they were able to drop ship from the manufacture. The follow up was excellent, great job on the timely execution of the order.

by: Luis 05/27/2021

Good timely service. The product was as advertised.

by: Chris 03/28/2023

Good value.

by: Jeff 07/13/2020

Shipped immediately and worked perfectly!

by: Terry C 01/26/2011

and will do a great job for a upgrade to my boat frame.

by: Rodman 12/30/2025

by: Robert 05/01/2026

by: David 08/05/2026

by: Gary 04/01/2025

true

Show More Reviews

See what our Experts say about this Redline Boat Trailer Parts

Do you have a question about this Boat Trailer Part?

How to Install Boat Keel Rollers When Replacing V Bunks on Trailer
It looks like you are on the right track. I would use the Universal Roller Brackets, # MBSPB, that you mentioned along with a 8 inch Long Keel Roller, # DL21712, a 5/8 inch Steel Shaft, and two pal nuts # CE10801. All of this is dependent on your trailer having and 8 inch area that the brackets can be installed in and adjusted for the roller to contact the keel of the boat. If you would like to send photos of the boat trailer, I would be glad to make a more specific recommendation.
view full answer...
Can A 3" Bow Roller Be Replaced With a 4" Wide Roller?
Hello Lee. Yes, you can replace a 3" bow roller with a 4" roller like part # CA62AJ as long as your bracket can accommodate a 4" roller. If you need a new bracket, part # MBSPB is what I recommend.
view full answer...
Can Bow Rollers Installed on Ranger Trail Boat Trailer Handle Weight or Only Guide Boat Loading
Thank you for providing the photo of your boat and trailer and the bow guide rollers you have just installed. Without knowing the particular item you purchased or its rated capacity I cannot give you any 100-percent assurances. I can advise that typically the rollers found at the bow end of a trailer are there for guiding the craft to its correct position on the trailer and not for bearing much of its weight. Typical power boats will have a much lighter bow than stern (due to the engine's...
view full answer...
Dimensions of the Universal Roller Brackets for Boat Trailers # MBSPB
I went out to the warehouse and pulled the Universal Roller Brackets, # MBSPB, to take some measurements for you. From the center of the hole to the nearest edge of the flat mounting surface measures 2-11/16 inches. The bracket is 1/8 inches thick so from the hole to the top of the bracket is 2-13/16 inches. The overall length of the bracket is 7-1/2 inches. The mounting surface is 6-1/8 inches long. I have made some pictures that show these measurements for you.
view full answer...
Recommend Keel Roller Setup For 14 Foot Aluminum Boat
I would recommend using the Universal Roller Brackets, # MBSPB, this will mount near the front of the trailer. Then you can use the 8 Inch Keel Roller, # DL21712, and a 5/8 inch Steel Shaft like part # CE10727A that includes two pal nuts You will need to measure your trailer to see if you have space to mount the brackets. You will need an 8 inch area that the brackets can be installed in and adjusted for the roller to contact the keel of the boat.
view full answer...
Can a Keel Roller for a Boat Trailer be placed on the Middle of a Boat Trailer
Normally, you will see keel rollers near the back of a boat trailer to help guide it on. But it is possible to place a roller else where on the trailer. You would have to be careful not to place all of the boats weight on one roller as this could damage the boat and trailer. If a roller would cause the boat to ride too high, you may want to re-think where the roller can be positioned. You may be able to back the trailer up further to limit how much side to side travel the boat can do....
view full answer...
Need A Couple Measurements Of The Universal Roller Brackets for Boat Trailers MBSPB
The Redline Universal Roller Brackets # MBSPB will measure 6-3/4" from the center of the 5/8" roller mounting hole to the bottom of the oblong frame mounting hole. I included a diagram of this as well. There are also a couple other diagrams included, just in case you needed a few more measurements.
view full answer...
Bow Roller for 14 Foot Row Boat Trailer
The Dutton-Lainson Roller you referenced, part # DL21712 would work fine for you, but the Redline Bow Roller, part # 404800 would probably be a better fit. You would also need the mounting brackets, part # MBSPB and a shaft part # CE10727A.
view full answer...
What Diameter U-Bolts Are Needed for the Universal Roller Brackets for Boat Trailers
The Universal Roller Brackets for Boat Trailers part # MBSPB will accept any u-bolt 7-1/6" in diameter or smaller. I would not advise using 1/2" as they are too large and not needed.
view full answer...
Can Hole be Enlarged on CE Smith Boat Trailer Roller Brackets for a 5/8 Inch Diameter Shaft
Generally speaking, it is not recommended to bore out the holes on the roller brackets # CE10211G because doing so could weaken the brackets. Adjustable mounting bracket # CE32004G would be a much better option. We also have # MBSPB as a possible option.
view full answer...
Recommended Roller Bunk Assembly for 3 Wide Trailer Frame
Yes, the mounting holes on a roller bunk assembly bracket would need to be spaced apart farther than 3" in order to fit a 3" wide frame. Instead of using the CE Smith Spool Roller Assembly part # CE10451G, I recommend using a combination of the brackets part # MBSPB, roller part # YR510Y-5, shaft/nuts part # CE10722A, and u-bolts part # CE15252A. Roller assemblies can be installed on trailers in a variety of different ways but in order to attach them directly atop a 3" wide frame rail like...
view full answer...
Roller Bunk Recommendation for a Boat Trailer with Carpeted Bunks
You can add rollers to your boat trailer which will make it slide in and out much easier and more so than carpeted bunks for sure. You can use roller bunks # DL21741 and attach them directly to the bunks you have now. Be sure to get rollers for all the bunks the boat touches. These rollers have a capacity of 3,000 pounds and are 5 feet long. I have included a link to a video review of them for you.
view full answer...
Rubber Keel Roller Shaft for 3-3/4 Inch Spool-Type Roller and Mounting Bracket
The 3-3/4" Rubber Keel Spool-Type Roller for Boat Trailers # 804 can use the Roller Shaft with Pal Nuts for Boat Trailer Rollers - Zinc-Plated Steel - 5-1/4" x 5/8" # CE10721A. We do not have a shorter roller shaft length, so if you have a mounting bracket requiring a shorter length you would need to trim it and then paint the trimmed edge to prevent corrosion prior to installing the pal nut. Most often this roller is paired with that shaft as well as the CE Smith Panel Bracket for 4"...
view full answer...
Set of Universal Roller Brackets for Boat Trailers
For a pair of the brackets use part # MBSPB. As long as everything fits on your trailer there isn't any reason they can't be installed either way.
view full answer...

Do you have a question about this Boat Trailer Part?

Info for this part was:

Expert Research:

Robert G

Expert Research:

Michael H

Installed by:

Cole B

Updated by:

Wilson B

At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.