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  1. Trailer Bearings Races Seals Caps
  2. Bearing Buddy
  3. Caps
  4. Bearing Protector Grease Cap
  5. 2.240 Inch
Bearing Buddy Bearing Protectors - Model 2240SS - Stainless Steel (Pair)

Bearing Buddy Bearing Protectors - Model 2240SS - Stainless Steel (Pair)

Item # BB2240SS
Our Price: $42.70
Trailer Bearings Races Seals Caps
Orders above $50 qualify for Free Shipping
Shipping Weight: 1.16 lbs
In Stock
Bearing Buddy Bearing Protector Grease Cap Trailer Bearings Races Seals Caps - BB2240SS
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Great for marine applications; the stainless steel construction provides the best in corrosion resistance. The design makes Bearing Buddy an easy way to protect your bearings by keeping water out and ensuring enough grease is in the hub. Great Prices for the best trailer bearings races seals caps from Bearing Buddy. Bearing Buddy Bearing Protectors - Model 2240SS - Stainless Steel (Pair) part number BB2240SS can be ordered online at or call 1-833-496-1390 for expert service.
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  • Reviews (18)
  • Q & A (0)
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Bearing Buddy Trailer Bearings Races Seals Caps - BB2240SS

  • Caps
  • Bearing Protector Grease Cap
  • 2.240 Inch
  • Bearing Buddy

Great for marine applications; the stainless steel construction provides the best in corrosion resistance. The design makes Bearing Buddy an easy way to protect your bearings by keeping water out and ensuring enough grease is in the hub.


  • 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
  • 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
    • Ensures longer-lasting fit than plastic or aluminum products
  • Includes rubber covers
  • Installs easily
  • Made in the USA


  • Fits 2.240" hub bore
    • Works with 1700 series outer bearings
    • Works with outer bearing cup (race) model 1729
      • Commonly found on 5,200-lb Dexter axles
  • Lifetime warranty

Bearing Buddy installed diagram

Bearing Buddy Operation

Replace your existing grease cap with a Bearing Buddy to ensure a safe, easy way to monitor and control the level of grease in your axle hub. To adjust the amount of grease in the hub, use a grease gun to add more through the appropriate fitting. Adding grease moves the Bearing Buddy spring-loaded piston outward 1/8".

The O-ring inside the barrel of the Bearing Buddy maintains a seal from the outside. The interior of the Bearing Buddy is pressurized, preventing water from entering the barrel and diluting the grease.

An automatic pressure-relief feature is built into the Bearing Buddy. When the device is full, grease will seep around the edges of the piston and into the barrel. This prevents overfilling that can damage the inner seal.

You can manually check the grease level in your Bearing Buddy by pressing on the edge of the piston. If you can rock or move the piston, the hub is properly filled.

43408 Bearing Buddy Model 2240SS - Stainless Steel (Pair)

Customer Satisfaction Score:

Customer Reviews

Bearing Buddy Bearing Protectors - Model 2240SS - Stainless Steel (Pair) - BB2240SS

Average Customer Rating:  4.7 out of 5 stars   (18 Customer Reviews)

Great for marine applications; the stainless steel construction provides the best in corrosion resistance. The design makes Bearing Buddy an easy way to protect your bearings by keeping water out and ensuring enough grease is in the hub.


The product is fits and functions properly, a little expensive but there are no alternatives to this size bearing cap. The delivery packaging was inadequate. There was no packing material and the items bounced around inside the box damaging some of the individual packaging, though the items themselves were rugged enough to withstand the abuse.


Solid built and exactly as advertised.


It took a long time to get them because they were out and had to get them from the manufacturer. Once I got them and put them on they seem to be fine. It's been almost a year and still working


When the local national chain said that they would have to order some trailer bearing products for me that are fairly common, I said "Don't bother" and ordered them online from A couple of days later I installed the parts. Perfect fit and service from a good company. They are in Missouri and "Showed Me" once again.


E trailer had the 2.24 bearing buddies in stock in stainless steel. They shipped them the same day that I placed the order and the shipping charges were reasonable and I received my order within five days. I'm very pleased with the service and the product, they fit perfectly.


I haven't had a chance to put them on yet because it's been way too cold here in Michigan but they arrived on time and someone from etrailer followed up with me which I would like to compliment them on. This wasn't a big order but they still took the time to let me know that they appreciated my business. I will definitely order from here in the future.


Perfect Fit and easy to install.
can not get the OEM dust covers any more for this axel, it is on an old camper we made into a trailer. Easy re lubrication is a plus.


etrailer is an excellent company to deal with and their products are top notch. I believe their customer service is the best I have seen, bar none. I would definitely recommend them to anyone. Thanks.


Items were listed at a good price. A lot of sizes to choose from but got info help from etrailer and determined size I needed. Went on great.


Great product,could have used directions enclosed, but found them online.


Unfortunately I ordered the wrong size and its stillhanging onmy shop peg board !


Worked just like advertised and fit and price were perfect


Ordering was easy and service was great. I received my order timely. I haven't had a chance to see if they fit but that would be my fault if they don't. Thanks good job.




Very easy ordering process, very fast shipment. Ordered on Sun and arrived on Wed.


They were the perfect size we were looking for.
Thank you for the speedy delivery.




See what our Experts say about this Bearing Buddy Trailer Bearings Races Seals Caps

  • Dimensions of Bearing Buddy BB2240SS
    The Bearing Buddy Bearing Protectors - Model 2240SS - Stainless Steel (Pair) # BB2240SS have a lip that is 3/8 inch that drive into the hubs. The inside of the Bearing Buddy from the edge to the retaining snap ring measures 1 inch on the inside.
    view full answer...
  • How To Pick Out Bearing Buddy for a Trailer Hub with 2.24 Bore
    If the bore of your hub measures 2.25 inches or very close to it the correct Bearing Buddy would be the part # BB2240SS that you referenced. We have several jack wheels available, but none of them are universal. I attached a link to see them all, but you will need to know what jack brand/model to pick out the correct one.
    view full answer...
  • Need Bearing Buddy for 2-1/8 Inch Diameter Trailer Hub Bore
    The closest Bearing Buddy we have to a 2-1/8 measurement is going to be a slightly larger set that measures 2.240 inches, # BB2240 or # BB2240SS. In order to determine the correct Bearing Buddy for your trailer, the best way is to get the inner and outer bearing numbers on the bearings and/or the number on the outer cup (race). The Bearing Buddy part numbers listed above fit 1700 series outer bearings with race model 1729.
    view full answer...
  • Bearing Buddy for Hub Bore of 2.25-Inches
    For a hub that uses a 2.25-inch grease cap the Bearing Buddy to use will be either chrome set # BB2240 or stainless steel set # BB2240SS. It is best to use a caliper like # 301-17068 when measuring the hub bore as this gives the most accurate dimension. It is better not to measure the old grease cap since these can become distorted from the installation and removal processes.
    view full answer...
  • Bearing Buddy Bearing Protectors for a 2-1/4 Inch Pilot Hole
    The correct tool to use for measuring the pilot hole opening of a trailer hub is a digital caliper like part # PTW80157 to the nearest thousandth. However, based on the 2-1/4" measurement you provided you will want to use the Bearing Buddy Bearing Protectors part # BB2240SS for stainless or part # BB2240 for chrome. The stainless will resist corrosion better than the chrome. I have attached a review video of both options for you.
    view full answer...
  • Bearing Buddy Bearing Protectors For a 2-1/8" Hub Bore
    The closest Bearing Buddy Bearing Protectors we have to your 2-1/8"(2.125") measurement are as follows. 2.047" # BB2047SS 2.080" # BB2080SS 2.240" # BB2240SS I do recommend checking your hub bore with a Digital Caliper # PTW80157 to verify your exact measurement(see image). If you find a different measurement please let me know the exact diameter of your hub bore.
    view full answer...
    Image 1 for
  • Recommended Bearing, Race, and Seal For Grease Conversion on Trailer Hubs
    We have Bearing Buddy Bearing Protectors that are the 2.240 inch you referenced but they are not threaded. They are part # BB2240SS for stainless or # BB2240 for chrome plated. If you don't want to replace your hubs to utilize those, then the best option is to keep your oil cap as a grease cap and you can still change over to grease. For the bearings, races, and seal, you will want the Bearing Kit for #84 Spindle, L44649/L68149 Bearings, 10-19 Double Lip Seal # BK2-100. You may also...
    view full answer...
  • Bearing Buddy Sizes for Replacing Grease Cap on Utility Trailer
    I would first recommend getting a Digital Caliper # PTW80157 to measure the hub that the Bearing Buddy will be pressed into. This will insure that you have a correct fit. Bearing Buddy Sizes -1.781" # BB1781SS -1.810" # BB1810 -1.938" # BB1938SS -1.968" # BB1968SS -1.980" # BB1980A-SS -2.047" # BB2047SS -2.080" # BB2080SS -2.240" # BB2240SS -2.328" # BB2328SS -2.441" # BB2441SS -2.562" # BB2562SS -2.717" # BB2717SS
    view full answer...

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Info for this part was:

Employee Tyler C
Written by:
Tyler C
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Chris R
Video Edited:
Chris R

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