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  1. Boat Trailer Parts
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  5. 3-1/4 Inch Diameter
  6. 3-3/4 Inch Long
Yates Bow Roller for Boat Trailers - TPR - 4" Long - 1/2" Shaft - Blue

Yates Bow Roller for Boat Trailers - TPR - 4" Long - 1/2" Shaft - Blue

Item # YR450B
Our Price: $12.29
Boat Trailer Parts
Shipping Weight: 0.64 lbs
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Replace the standard rubber bow roller on your boat trailer with this blue thermoplastic rubber version from Yates. TPR material is stronger than rubber and softer than polyurethane, and it won't leave marks on your boat. 1-800-940-8924 to order Yates Rubber boat trailer parts part number YR450B or order online at Free expert support on all Yates Rubber products. Great prices and Fastest Shipping for Yates Bow Roller for Boat Trailers - TPR - 4" Long - 1/2" Shaft - Blue. Boat Trailer Parts reviews from real customers.
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  • Reviews (92)
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  • Videos (1)
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Yates Rubber Boat Trailer Parts - YR450B

  • Rollers
  • Bow Roller
  • 3-1/4 Inch Diameter
  • 3-3/4 Inch Long
  • Thermoplastic - Non-Marking
  • Fits 1/2 Inch Shaft
  • Yates Rubber

Replace the standard rubber bow roller on your boat trailer with this blue thermoplastic rubber version from Yates. TPR material is stronger than rubber and softer than polyurethane, and it won't leave marks on your boat.


  • Replaces 1 bow roller on your boat trailer
  • Eases loading and unloading of boat
  • Supports front of boat as it sits on trailer
  • Helps to absorb road shock while boat is being towed
  • Constructed of blue thermal-plasticized rubber (TPR)
    • Non-marking, non-scratching material
    • Stronger and more durable than traditional rubber
    • Softer and more pliant than polyurethane
  • Made in the USA


  • Application: 4" wide bracket with 1/2" diameter shaft
  • Dimensions: 3-3/4" long x 3-1/4" diameter

450 B Yates 4" Bow Roller - Blue Thermal Plastic Rubber

Video of Yates Bow Roller for Boat Trailers - TPR - 4" Long - 1/2" Shaft - Blue

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

Video Transcript for Yates Boat Trailers Bow Roller Review

What's up everybody, it's AJ with Today we'll be checking out the Yates bow roller. So this is going to be a replacement part that goes right here on the front of your trailer. Let's say yours is worn down or it's not spinning like it's supposed to anymore because it's been out in the weather so long. It's an easy part that you can replace and get back up, running as new. Let's check it out.

Now what this is gonna do, is it's gonna go right here on your trailer and you can roll it, so that means when you're pulling your boat on there, and let's say the bow hits it, it's gonna roll up like that and it'll be just fine, it'll roll all the way. Acts as a stopper too, so as it hits this, it's better than it hitting the trailer and scratching up your boat. Also, when it's just sitting on there and you've got to tie it down, if your boat is to move and travel up and down, it's gonna hit this instead of the metal parts of your trailer, so that's, again, just gonna save your boat from getting all scratched up and damaged. It's made out of a thermal plasticized rubber. So it's gonna be a little more soft than regular polyurethane and has a little more of a structure than rubber does, so it's a nice in the middle of both of those.

I also wanna point out that the material it's made of isn't gonna leave marks on your boat. So some of the other ones, if it was just made rubber, and you we're to come up here, pull your boat up and hit it kind of hard, it might leave black marks here on the bottom of your boat. This isn't gonna happen with this one, there's not going to be any scraps or issues. Now I'll give you some measurements. It's going to be three inches and three quarters long, that's the width here.

And then it's also gonna have a diameter here where the hole where you gonna put the bolt in is going to be a half inch. So that way you can just get the right hardware to make sure it's gonna go through your trailer and your roller. Now you also can get these in a couple different colors, they also will come in blue and black. So if you don't want the yellow one that we we're installing today, there's two other options at might match your boat trailer a little bit better. It's really easy to install.

You just take this bolt out. Check out how we did it, Ready to install our new roller here, we're just going to set it into place. We're gonna use the existing hardware from the old one that we took out. Just slide it through the holes in the middle, mash it up on the other side. Now, something that would suggest is if you aren't getting ones with the bells on the side, and you see this the old one we took off. It did have those, so this bolt's a little longer than it should be so it's gonna stick out. You can get different sized hardware to run through that where there's not as much sticking on both sides, but this will still work like this. So we have the washer on this end, push there, and then we're gonna put a washer and nut on the other side. Just gonna get started by hand and I'll come back with tools and tighten it down. Got a ratchet and a wrench on here, just need to go ahead and tighten it down. So I went in, tighten it down, made sure the bolt head and nut here are tight, but this can still freely spend 'cause we're gonna need that when you go to put the bolt on. Overall, super easy to replace and get this part back up and running. and I liked this one because it's not gonna scuff up the boat either. So you don't have to worry about making any marks and now this rolls like it was supposed to again, it's gonna all work with that trailer and make it easier to get that boat up there. Well, I think that does it. Thanks for hanging out. I hope this helped..

Customer Satisfaction Score:

Customer Reviews

Yates Bow Roller for Boat Trailers - TPR - 4" Long - 1/2" Shaft - Blue - YR450B

Average Customer Rating:  4.9 out of 5 stars   (92 Customer Reviews)

Replace the standard rubber bow roller on your boat trailer with this blue thermoplastic rubber version from Yates. TPR material is stronger than rubber and softer than polyurethane, and it won't leave marks on your boat.


With this roller having a drop/lip about 1-1/8" in from the edge on both sides, our boat will rub on both sides as it comes up on the roller. Do you have a roller that is a smooth transition from the edges to the center? The 4" fits, but not the drop/lip coming to the center of the roller from each side. We would like to return it and get a different one if you have what we are looking for.
Thank you for your time

Etrailer Expert

Brooke M.


Part # YR4174-4 would be a better fit. It is still four inches long but doesnt have any differing grooves. Its all one smooth angle. I can have our customer service team reach out.


as you can see, I still have some parts to replace. But I ordered these parts at the beginning of this week. Used free shipping. Delivered Saturday, done Saturday afternoon. So easy. Looking forward to finishing this trailer. Will use etrailer again


I am a trailer sailor and always looking for ways to make the task of raising the mast easier. I am in the middle of creating a roller stabilizer A frame to keep my 30' mast from wandering to either side while raising it. This roller is part of my new system and I expect it to keep the mast centered upon lifting. However, it is still snowing here in The Rockies so the actual test is going to have to wait a while longer.


Exact match replacement


As advertised


The roller worked perfectly for the trailer I was redoing. I also bought a couple of other parts that I needed they have great products, quick shipping and excellent customer service. Will keep buying all of my trailer parts from here


Product will function as expected but the quality of the finish is not what I expected. Many scuffs and imperfections.



After one year this roller is still soft and has not marked my boat. Happy with purchase.


A great bow roller at an excellent price.In fact , I need 2 more 4 inch keel rollers ( blue ) that I hope they can sell me. This is a great place to get all of your trailer needs !!!


I was very impressed with the great service, excellent products, and end results after assembling my boat trailer with the parts ordered from Etrailer. Shipping was fast. Very reasonable prices. Will definitely order thru this company again and have already referred friends of mine to have them take a look at your site.


I plow plastic pipe into the ground for livestock water. I bought these puppies to be pipe guide rollers on my cat dozer. They will keep the pipe in alignment as it comes off the spool and guide it into the ripper boot. Each spool has 2,000 ft in it. The first job is six miles long. Should work like a champ!


The part came quickly, easy to install, has proved to be very sturdy, and does not mark up my sailboat hull.


Great product and a great price. Shipping was fast. Upgrading my boat trailer and the existing bow stop was beat up from power loading. Now with parts from etrailer it is looking like new again.


The Bow roller and tail light converter arrived promptly and in exactly as described. The tail light converter is a blessing. My 1998 Toyota 4Runner now throws the correct signals to my boat trailer. Yeehaw!


This was a great replacement for my old worn roller that was on my trailer and it got here quick also.



holding up great still looks brand new


Bow Roller looks very good, solid construction, I'm happy with the purchase. Thank you.


Product works as advertised. I'm changing regular rubber bow roller because was making black marks on my boat for this product that does not leave marks and does the job perfectly.


Product was exactly as described. The exact measurements of the product where very helpful, in fact that is why I bought from etrailer. Other websites did not provide as detailed information.


Perfect replacement,,, better than the original. Care was taken when packaging and shipping was very timely


My order came quickly and everything I ordered was in the same box. I installed everything yesterday. Etrailer was easy to do business with I will be back


Came sooner than I expected, super happy. I can now finish up my boat trailer so I can regain my sanity from my wife wanting it out of the yard!!!



We received this bow roller soon after it was ordered and are completely satisfied with it. It replaced our broken-old one with ease and simplicity. Thanks!


Relly nice roller. Fits the shape of my bow mauch better then the old straight V type. I highly recomend these rollers and E Trailer.


Really liked the color at first,but the roller mars real bad and now looks awfu. I;m going to replace the the roller soon. tired of it looking this way....


Perfect fit replacement





Fit right on bracket to replace black rubber roller. Good quality.

Show More Reviews

See what our Experts say about this Yates Rubber Boat Trailer Parts

  • Looking For Replacement Bow Roller for Boat Trailer
    The # YR450B roller you mentioned comes about as close as we can to the dimensions you mentioned. The Bow Roller is 3-3/4 wide by 3 inches in diameter, and uses a 1/2 inch shaft.
    view full answer...
  • Non-Marking Bow Roller Recommendation for a Boat Trailer
    The Yates Bow Roller part # YR450B that you referenced should work well for you since it is a similar size and is designed to fit a 1/2 inch shaft. Also, this roller is designed to not leave marks on a boat so it would be a great option for you.
    view full answer...
  • Choosing A Replacement Bow Roller
    When choosing a replacement bow roller for your boat trailer, you want to measure the width and diameter of your current bow roller. The replacement should have the same width and diameter as your current roller to fit properly. The Yates Bow Roller # YR450B is a great replacement for a bow roller that is 3-3/4 long with a 3 inch diameter. The # YR450B roller fits on a 4 inch wide bracket with a 1/2 inch diameter shaft.
    view full answer...
  • Can White Caps on Yates Bow Roller YR450B Be Replaced
    The white section of the Yates Bow Roller, # YR450B, is molded through the center of the roller. The bow roller does not have caps and is one piece.
    view full answer...
  • Recommended Bow Roller for Boat Trailers
    I like the Yates Bow Roller for Boat Trailers item # YR450B. This roller is 3-3/4" long x 3-1/4" in diameter and will replace the standard rubber bow roller on your boat trailer with this blue thermoplastic rubber version. It will help to prevent scratches and also serve as a bump stop. This roller fits a 4" wide bracket with 1/2" diameter shaft. If this is not what you have let me know what size your bracket is and I can find you an option. I have linked an installation and review video...
    view full answer...
  • Recommendation for Replacement Bow Stop Roller Measuring 4 Inches with 1/2 Inch Hole
    Hey Craig, thanks for your recent order with We really appreciate your business. I have a couple different options that would work for you. Yates offers the thermoplastic rubber bow roller in yellow, # YR450Y, and blue, # YR450B. The thermoplastic rubber material is stronger and softer than the standard polyurethane rollers and it won't leave marks on your boat. These rollers measure 3-3/4 inches long and are made to be used in 4 inch wide brackets with 1/2 inch diameter...
    view full answer...
  • Bow Rollers With Bell Ends For a 3-3/4" Inside Width Mounting Bracket
    The Yates Bow Bell # YR400Y I see you were looking at the 5-1/4" diameter is the outermost diameter of the roller. This particular part is designed to fit on the outside of the bow roller bracket. Here is a list of the bow roller assemblies we have with bell ends that will fit a 3-3/4" inside width 4" outer width mounting bracket. Black TPR # YR450BLK-400BLK Blue TPR # YR450B-400B Yellow TPR # YR450Y-400Y
    view full answer...
  • How to Prevent Metal Bow Roller Brackets from Contacting the Boat
    Almost all bow roller assemblies have an industry standard hardness of 85a durometers. I was able to call my contact at Yates to confirm this. I do have a solution for you but we do not have any bow rollers with a hardness rating greater than 85a durometers at this time. However, I believe the problem you are experiencing can be eliminated using a wider roller as this would in turn dissipate the weight more evenly to minimize contact with the metal brackets. I recommend using the Bow...
    view full answer...
  • Replacement Bow Roller with Bell Ends for a 2011 Skeeter SX200 Boat Trailer
    It would appear from the photo you attached that the distance between your mounting bracket is 4" wide which means the correct blue roller assembly for you is the Bow Roller Assembly w/ Bells for 4" Wide Bracket part # YR450B-400B. This assembly will be a nice upgrade for your trailer as the thermal-plasticized rubber will help to absorb shock without marking the boat up and the included bell ends will ensure there is no contact with the mounting bracket. I have attached a review video...
    view full answer...
    Image 1 for
  • Replacement Bow Roller for 5/8 inch Shaft
    I have a few different options for you. The Rubber Endcap # YR134-5 that you mentioned can be used with keel rollers, spool rollers, or bow rollers. If you are wanting to stick with a bow roller, We do have a Bow Roller Assembly # YR450B-400B available that comes with a 1/2 inch shaft. This will eliminate the need to find a bow roller with a bigger shaft hole. I did go out to the warehouse to see with it was possibly that a 5/8 inch shank could fit in a bow roller that has a 1/2 inch hole...
    view full answer...
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Info for this part was:

Employee Andrew K
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