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  1. Trailer Bearings Races Seals Caps
  2. Bearing Buddy
  3. Caps
  4. Bearing Protector Grease Cap
  5. 5200 lbs Axle
  6. 6000 lbs Axle
  7. 7000 lbs Axle
Bearing Buddy Bearing Protectors - Model 2717A w/ Auto Check - Chrome Plated - Qty 2
Bearing Buddy

Bearing Buddy Bearing Protectors - Model 2717A w/ Auto Check - Chrome Plated - Qty 2

Part Number: BB87SR
In Stock
$43.28
Retail:$82.78
You Save: 48%
Trailer Bearings Races Seals Caps
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Check grease levels at a glance with the blue auto-check ring. Chrome plated Bearing Buddies maintain light grease pressure inside the hub to protect your bearings, even when submerged, while the zerk fitting makes adding grease quick and easy. Great Prices for the best trailer bearings races seals caps from Bearing Buddy. Bearing Buddy Bearing Protectors - Model 2717A w/ Auto Check - Chrome Plated - Qty 2 part number BB87SR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (1711)
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  • Videos (2)
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Bearing Buddy Trailer Bearings Races Seals Caps - BB87SR

  • Caps
  • Bearing Protector Grease Cap
  • 5200 lbs Axle
  • 6000 lbs Axle
  • 7000 lbs Axle
  • Bearing Buddy
  • 2.72 Inch

Check grease levels at a glance with the blue auto-check ring. Chrome plated Bearing Buddies maintain light grease pressure inside the hub to protect your bearings, even when submerged, while the zerk fitting makes adding grease quick and easy.


Features:

  • Replaces the grease cap in the axle hub
  • Prevents wheel-bearing failure
    • Keeps water and dirt out of hubs and bearings
    • Allows boat trailer wheels to be completely submerged
    • Stops corrosion and pitting on bearings
  • Provides easily accessible grease fitting
    • Makes adding grease to the bearings quick and simple
  • Maintains slight, controlled pressure (3 psi) with spring-loaded piston, preventing water from entering hub
  • Allows visual monitoring of grease levels with blue indicator ring
    • Ring sits flush with top of cylinder when full
    • If ring is below top, add grease to move piston outward 1/8"
  • Prevents overfilling and rear seal damage with automatic pressure-relief feature
    • Grease seeps around piston edges and into barrel when full
  • Constructed of stainless steel internal parts and triple-chrome-plated steel barrel
    • Ensures longer-lasting fit than plastic or aluminum products
  • Includes rubber covers
  • Installs easily
  • Made in the USA


Specs:

  • Fits 2.717" hub bore
    • Works with outer bearing models 14124 and 14125A
    • Works with outer bearing cup (race) model 14276
      • Commonly found on 5,200-lb to 7,000-lb Dexter axles
  • Lifetime warranty


Bearing Buddy Diagram without blue ring text

Bearing Buddy Operation

Replace your existing grease cap with a Bearing Buddy for an easy way to monitor and maintain the grease level in your axle hub. Use a grease gun to add grease through the zerk fitting. As the hub fills, the spring-loaded piston moves outward, raising the blue auto-check ring. When the blue ring is 1/8" above the steel retaining ring, the hub is properly filled.


The O-ring inside the barrel of the Bearing Buddy maintains a seal from the outside. The pressurized grease inside the hub helps prevent water from entering and contaminating the grease. Bearing Buddy also includes an automatic pressure-relief feature to help prevent overfilling and damage to the inner seal. Once the hub is full, excess grease seeps around the edges of the piston and into the barrel while the blue auto-check ring remains raised.


Check Grease Level with a Quick Glance
Blue ring close up

Check the blue auto-check ring to see when it's time to add grease. If the ring has receded below or is flush with the steel retaining ring, more grease is needed. If the lip of the blue ring is 1/8" above the steel retaining ring, the hub is properly filled.



43712 Bearing Buddy Model 2717A - 2.717 Bore - Blue Indicator Ring - Chrome Plated - Quantity 2





Video of Bearing Buddy Bearing Protectors - Model 2717A w/ Auto Check - Chrome Plated - Qty 2
Video Thumbnail Video Player Dialog

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




Video Transcript for All About the Bearing Buddy Bearing Protectors-BB87SR

Hello, everybody. This is Jeff at etrailer.com. Today we're gonna take a look at the Bearing Buddy Chrome Plated Bearing Protectors for the 2.717 Hub Bore, and it is for a quantity of two. Now these protectors are great for marine applications, the Bearing Buddy design, it's an easy way to protect your bearings by keeping water out and ensuring enough grease is in the hub. These will replace the grease caps that are on your axle hub, and they'll provide your trailer bearings with premium protection. These will prevent wheel bearing failure by providing a nice, easy way to control the grease volume in your axle hub.

They do help keep water and dirt out of the hubs in the bearings, and it'll even allow your boat trailer wheels to be completely submerged. It does stop corrosion and pitting on the bearings. If you notice, it provides a nice, easily accessible grease Zerk fitting here, so it makes adding the grease to the bearings very quick and simple. All you have to do is remove the cover, put your grease gun onto the Zerk fitting, pump the grease in there. Now it will maintain a slight controlled pressure, about three PSI, using a spring loaded piston.

This will prevent water from entering the hub. And it'll allow visual monitoring of the grease levels. We're using this blue indicator ring you see right here. This ring is designed to sit flush with the top of the cylinder when it's full. Now if the ring goes below the top, you just add grease to move the piston outward.

This does prevent overfilling and rear seal damage with the automatic pressure relief feature. Basically, the grease will seep around the piston edges and into the barrel when it's full. Now these parts are constructed of stainless steel internal parts and has a triple chrome plated steel barrel. It does ensure a longer lasting fit than some of the plastic or aluminum products that are out there. And as we've mentioned, you'll notice it comes with these rubber protective covers that when you're done putting the grease in, just push them all the way over there and that'll keep anything from getting inside.

Now to install these, it's very easy. Basically all you have to do is remove your grease cap, put this on the hub, and then using a block of wood against the Bearing Buddy, tap on that block of wood so this will install equally into your hub. This part is made in the US. A few specs, again. We mentioned it's designed to fit the 2.717 hub bore diameter. They also make these in other available diameters to fit your hub size. This will work with the outer bearing model numbers 14124, and 14125A, which are commonly found on the 5,200 pound to 7,000 pound Dexter axles. But that should do it for the review on the Bearing Buddy Chrome Plated Bearing Protectors for the 2.717 Hub Bore.

Customer Satisfaction Score:

Ratings & Reviews

4.8

1711 reviews
5 Stars
(1512)
4 Stars
(126)
3 Stars
(29)
2 Stars
(13)
1 Star
(31)
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by:
Fit like a glove!! Installation was very easy and shipping was great
by:
They fit perfect, this will make keeping up with bearings so much easier
by:
Thanks for the follow up, William. I'm very happy with my Bearing Buddies but most of all, I appreciated your help figuring out the proper size in needed. The size you sent are the perfect fit.
Thank you very much!
Kevin
by:
Product is as described. Very pleased. Customer service was exemplary.
by:
JUST WHAT WE NEEDED
by:
by:
by:
by:
Product Review: Only intimidating before you install. Really easy, pop out the OEM caps and replace with the bearing buddies, fill the buddies with your grease gun and you are done. Nice to know my (well greased by the factory ) wheel bearings now have a supply of grease under slight pressure to be sure there will always be grease in my bearings and foreign matter will be kept out.
Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

4/30/2026

They look great, Lex. Will make maintenance a breeze now.

by:
Delivered right on time fast shipping great products!
by:
The Bearing buddy’s fit my hub well, and give me added confidence when launching my light duty boat trailer. They were simple enough to pump grease into, although with my poor quality grease gun, I can’t tell if they got enough. The beauty is I can just keep pumping that grease in there periodically. The idea that the positive pressure they create helps keep water out of the hub assembly is reassuring, and they add to that cool, roadworthy aesthetic that red necks love.
Jesse M. profile picture
Etrailer Expert

Jesse M.

10/26/2026

Thanks for another great review, Clark! Glad the Bearing Buddies fit perfectly and give you that extra peace of mind when launching your boat. Keeping those bearings protected is always a plus, and the classic redneck-approved look is just a bonus! Happy boating!

by:
Been using bearing buddy hub covers for over 20 years on multiple different units. Just better than the copycat versions. Have adapted them to pivot spindles on front mount deck mowers and use them on both on road trailers and off road trailers.
by:
I love them, but they will not work if you have hubs with grease fittings on the spindle. The BB piston will hit the fitting on the spindle. Then, My grease fittings were the driven-in type, so that ballooned the project.
by:
Great price, excellent quality, delivery was fast and installation was easy, the bearing buddies arrived today they are on the trailer and ready to go.
Thanks e trailer!
Brian profile picture

Brian

7/26/2026

Working great, holding up very well. Great quality and excellent value.

Jerred H. profile picture
Etrailer Expert

Jerred H.

7/26/2026

@Brian That's great to hear Brian! Glad the Bearing Buddies are working so well for you.
by:
Still never fit. Do I ground off the threads. Enough for it to fit. This is a strange axel. I took the brakes down to a trailer company and they never seen brakes like this before I got them to work and the bearing size never had any in stock so I used the old ones good enough to go snowmobiling this winter. Hope there’s snow not to far.
by:
All 3 products are working well. Before the new parts, the trailer blew a tire which bent up the fender and smashed a tail light. I ordered what I needed from eTrailer and put my trailer back together. Parts were all available and came quick. I didn't miss any fishing opportunities as a result.
by:
Bearing Buddies customer support is horrible, one of my new caps was defective the grease zerk came off, I contacted them and this is what they sent me, I guess I’m supposed to bring it to a mechanic and pay $$$ to have it fixed ! Garbage !
by:
Perfect for my trailer and will help seal out water and hopefully add life to my bearings. etrailer is and always will be my stop for great products and service!
Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

4/28/2025

Thanks for saying that, David! I love knowing that we are your go-to :D

by:
Great product! Fits very well and is well designed for my tri axle boat trailer.
by:
I used customer service and he helped me with the measurements and getting the right product for an extremely old trailer. The product is perfect they fit perfect and I really appreciate everything they did.
by:
Really only needed a cap. Because not a boating trailer. But 1.81 diameter in dust caps is hard to find. It fits good. Etrailer is the place, when it comes to a large size variety.
by:
I replaced my plastic hub cap that fell off with these. The stainless steel models are extremely high quality. Very pleased with the purchase. After pounding them on my new hubs, I don't know how I can remove them to service the bearings in the future. Hopefully I won't have to take them off.
by:
I lost one of four bearing buddies. I love these things, I just wish they made a model that could be used with greasable spindles. Now to figure out why the first one came off my brand new trailer. I used red picture on this one, we will see.
by:
Installation instructions were very helpful and thanks to the customer service rep, these fit my hub assembly perfectly.
by:
Quick shipping easy install
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See what our Experts say about this Bearing Buddy Trailer Bearings Races Seals Caps


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Dustin K
Video Edited:
Dustin K
Employee Daron K
Updated by:
Daron K
Employee Dawn Z
Updated by:
Dawn Z
Employee Ryan F
Written by:
Ryan F

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