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  1. Trailer Bearings Races Seals Caps
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  4. Standard Grease Cap
  5. 1.98 Inch O.D.
Grease Cap - 1.988" Outer Diameter - Drive In

Grease Cap - 1.988" Outer Diameter - Drive In

Item # F001518
Our Price: $3.79
You Save: 5%
Trailer Bearings Races Seals Caps
Shipping Weight: 0.09 lbs
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Trailer Bearings Races Seals Caps F001518 - Standard Grease Cap - TruRyde
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Grease cap fits trailer hubs with 1.988" inner diameter and has corrosion-resistant zinc plating. Great Prices for the best trailer bearings races seals caps from TruRyde. Grease Cap - 1.988" Outer Diameter - Drive In part number F001518 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (189)
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TruRyde Trailer Bearings Races Seals Caps - F001518

  • Caps
  • Standard Grease Cap
  • 1.98 Inch O.D.
  • TruRyde

Grease cap fits trailer hubs with 1.988" inner diameter and has corrosion-resistant zinc plating.


  • Grease cap for trailer hubs
  • Drive-in installation
  • Corrosion-resistant zinc plating
  • 22-Gauge steel construction


  • Quantity:1
  • Flange diameter: 1.988"
  • Crown height: 0.94"
  • Flange length: 0.218"
  • Overall height: 1.156"

Dimensional Information

GC Diagram
Part No.Material GaugeFlange Diameter (A)Crown Height (B)Flange Length (C)Overall Height (D)
1500 Series

001518 Fulton Zinc Plated Grease Cap, 1.988" x 0.218" Flange

Customer Satisfaction Score:

Customer Reviews

Grease Cap - 1.988" Outer Diameter - Drive In - F001518

Average Customer Rating:  4.7 out of 5 stars   (189 Customer Reviews)

Grease cap fits trailer hubs with 1.988" inner diameter and has corrosion-resistant zinc plating.


High quality product(s) delivered sooner than promised. The merchandise arrived in good condition. They are a perfect fit for my Dexter 3500# axles. I have ordered many items for my RVs, my SUV and pickup over the past 14-years. I have never been disappointed with eTrailer's offerings and customer service. Thank you eTrailer


Excellent parts service and customer service. These folks are friendly, professional and knowledgeable. Received the parts and discovered one of the parts was damaged in shipping. Contacted them and Neil was on it immediately. The part is on the way. I will always buy from this company.


I am rebuilding an old trailer and was lucky enough to get Justin on the phone. Hel listened to my needs and searched until he found the hanger bolts and bushing the fit my equalizer perfectly. He is a real pro! The trailer is coming along great thanks to your great staff


Basic cap for the trailer bearing, fit tight as expected


Arrived as advertised, prompt, good fit, wearing well. Would definitely buy again.


Couldn't be happier !!

I went to
{online store] and took old one in with me, they had to order it in and $XX.00 freight to boot. It showed up wrong and they wouldn't credit the freight back.

I went online and order here and no problems and received sooner than expected.

Top customer service and yes, now marked in my favorites for future use.

Share a smile

Micheal E.


Its been a year and that grease cap is still going strong. I havent had a single problem and have painted it to match my STEELERS GOLD rims. Thanks for such a great product and service.


I Installed two sets on my 14 foot Trailer. In the mountains of NC, brakes dont seem to last on the truck. I use the truck and trailer for pick up and delivery of Ventracs, that weigh in at around 1500LBS. The trailer empty will actually stop the truck now. (I use the Redarc trailer brake controller).
Not having to constantly adjust them is a major plus also. I did wire both axles indepentanly of each other to the junction box. If I happen to have a wire get torn loose, I will only lose braking on one axle and not both.
They were a little expensive, but will save me from replacing the brakes on my truck twice a year.
Over all, I am glad I got the two sets.


Item arrived quickly. The cap was a little loose, but I was able to take a hitch pin and flare the edge of the cap slightly. After that it fit perfectly. Thanks etrailer!


I ordered 3 Taskmaster 4.80-12 Bias Trailer Tire with 12" White Mod Wheel - 4 on 4 - Load Range C (Item # TTWAS12B4WMHP) on a Saturday. To my surprise they shipped them right away. The packaging was perfect and the wheels look strong and well made. This little kit trailer (cargo box is 60"x40"x24") has once been in a 3000 mile trip around the West, and the 8" wheels where almost 20 years old so I decided to get fresh tires and ordered the 12" wheels. I'll probably have to give the fenders a little more clearance but that's OK. I'm very happy with the product and service. Thank you guys!


Great product, great customer service


It all started about 10 years ago when I purchased a custom built trailer. The trailer is great, but one of the stub axle/wheel kits they put on was missing a race. By the time I got the trailer home -- about 7 miles -- the dust cap was missing. Later I pulled off the wheel and noticed the race was gone and I replaced it and the bearing. I purchased several dust caps locally, all of which were supposed to fit. None of the ones off my old vehicles would work. After losing several more caps, I ordered these. Thinking I would lose them fairly quick, I ordered extras. When the box arrived, I examined the caps and was pleased with the quality. I took the beer can off the wheel and carefully hammered a new cap on. Well, now after pulling the trailer a lot, on many bumpy and bad roads, this cap has not loosened a bit. I highly recommend these caps.



These caps are still on my trailer after many more miles of bumpy roads and pulling through pastures with high weeds and brush. Still very pleased.


Thank you for a fast response. Item missing and quickly shipped missing item. This is business integrity that builds trust and confidence.
Thank You
Jim Foy


Fast ship. Very thorough shipping info.



Great but had to alter them to fit.

by: 09/29/2022

Trailer gets very little use, caps work as they should.


I measured the hub and order the grease cap. It was installed using a piece of PVC pipe and a dead blow hammer and it sealed tight and looks great.





The grease caps were available on The ordering was simple and easy. They arrived earlier than expected and exactly as we wanted. They work on our trailer. We would order from again.


I love etrailer!


Grease cup as advertised. All parts arrived in good condition except one. One break plate was missing the strain relief on the back. All break plates had nicks on the two green wires where they exit out the back as if the wires were nicked during installation and bent 90*. Thank you for the links to installation of the items for they have been helpful.


They fit my hubs and keep the grease in for a good price. Not much else to say. I did go to the hardware store and get a pipe fitting to drive them in so I didn't dent them during installation.


Standard dust covers to replace bent on es


Thank you so much for replacing the damaged components in such a timely manner! The grease caps have been installed and the boat is in the water. I have been using etrailer for quite a while and have never been disappointed. This is my "go to" vendor for all of my trailer/towing issues.


Got two sets of bearings and new dust caps for our trailer works just fine and at this price couldn't go wrong, arrived quickly fit as expected what more can be said there bearings


It Was Great. It Got Here Before I Ordered It. Perfect Fit.


The bearings and race i have ordered are the perfect fir for our trailer. They are the identical match for the 1969 dilly, verry pleased with the price overall great kit. I would defiantly recommend to anyone replacing bearings and races for the 1969 dilly.


I ordered a hub cover for my trailer. Product was what I ordered and was delivered in an appropriate amount of time. When ordering I was concerned shipping costs were going to be high for a very inexpensive part, which occurs through other sites. However, shipping was relatively inexpensive. Good value and experience.

Show More Reviews

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

  • How to Determine What Size Grease Cap is Needed
    If you can provide the reference number for the OUTER wheel bearing, I can determine which replacement grease cap you actually need. You can also use a digital caliper to find the exact inside diameter of the hub bore. With a standard grease cap, the next larger size from the 1.98 inch is a 2.25 inch, which is quite a bit larger. If you're speaking of a bearing protector like the Bearing Buddy, the next largest size from the 1.98 is the 2.047 inch. If you click the provided link, you...
    view full answer...
    Image 1 for
  • Can Standard Grease Cap Replace EZ Lube Grease Cap on Trailer
    Standard grease caps that are made the correct diameter you need like the part # F001518 would work well to replace the ones you have now. The EZ lube caps are not any deeper than standard grease caps.
    view full answer...
  • Removing Rusted Grease Caps from a Trailer Hub
    Often times, especially if they are rusted, grease caps will take quite a bit of convincing to remove. When they are this stubborn, often times the caps will be destroyed in the process of removing them. Sometimes we beat them pretty hard in our shop or use a screwdriver to wedge them out. The only way to know if the Fulton Grease Cap, part # F001518, will fit is if you measure the inside diameter of the trailer hub. It should be 1.988 inches. It may be a little smaller due to rust, so...
    view full answer...
  • Determining the Size of Grease Cap Needed for Axle
    In order to determine the correct grease cap for your axle, you will need to measure the inner diameter of the hub where the grease cap presses in. I recommend using a dial caliper or another precise measuring tool since this measurement will have to be precise. Keep in mind that you will want your grease cap diameter just slightly larger than the inner diameter of the ring of your hub, but no more than about the 2 one hundredths of an inch, to ensure a secure fit. I have attached a link...
    view full answer...
  • Availability of Grease Caps or Bearing Buddies for Craftsman Lawn Tractor
    If you can reply with the inside diameter of the hub bore, I'd be happy to check if we offer any grease caps or Bearing Buddies that would work. You'll need to use an accurate measuring device like a digital caliper. A ruler or tape measure wouldn't be accurate enough.
    view full answer...
  • Replacement Grease Caps for 2007 Rockwood Freedom Model 2280 Tent Camper
    Replacement grease caps can be selected by measuring the diameter of your hub's bore. There are also several types offered. Trailer manufacturers may change some of the components they use on any given product; the only way to know the exact original part is to contact Rockwood with your camper's VIN number. An easier way is to use a precision digital caliper to measure the bore of your hubs. Once you know that you can use the link provided to choose both the type and size you need.
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  • How to Pick Out Replacement Grease Caps for a Trailer Hub
    You will want to use a dial caliper or micrometer to measure the inner diameter of the hub you have on your trailer to determine what size cap would be needed. Check out the picture I attached that shows this measurement being taken on a hub. I attached a link to all the grease caps we offer, once you know what size you need check out the link I attached to see all the sizes we offer.
    view full answer...
    Image 1 for
  • Correct Standard Grease Cap for Dexter 10" Hub for 3,500 Axle
    The Grease Cap - 1.988" Outer Diameter part # F001518 is correct for a Dexter 10" Hub for 3,500 Axle.
    view full answer...
  • How to Determine What Replacement Grease Cap is Needed For a Premier Dual Axle Dump Trailer
    I'm assuming you're speaking of a grease cap that's driven into the hub bore. Grease caps are available in different sizes. There are two good ways to determine which size you need. One is to locate the reference number off of the outer wheel bearing. Finding the outer wheel bearing would lead me to the reference number of the race, which would lead me to the grease cover diameter. Or, you could use a digital caliper like # PTW80157 and measure the inside diameter of the hub bore, as shown...
    view full answer...
    Image 1 for Image 2 for
  • How to Measure to Determine Correct Trailer Hub Grease Cap
    You will want to use a dial caliper or micrometer like part # PTW80157 to measure the inner diameter of the hub you have on your trailer to determine what size cap would be needed. Check out the picture I attached that shows this measurement being taken on a hub. I attached a link to all the grease caps we offer, once you know what size you need check out the link I attached to see all the sizes we offer. The closest cap we have to what you listed is the part # F001503 which has an outer...
    view full answer...
    Image 1 for
  • Is There a Special Tool Or Trick To Installing Trailer Grease Cap On Trailer Hub?
    One simple trick to help install the Grease Cap # F001518 from the Timken Bearing Kit # TMK34ZR is to put the cap in the freezer. The extreme cold temperature will actually cause the steel to shrink slightly making it easier to get the cap started. Be sure to clean both the portion of the cap and hub where they fit together as any lubricants on the surfaces will actually make it harder to install since they add to the thickness. Also if you have a large socket which fits over the cap but...
    view full answer...
  • Grease Cap Replacement Recommendation for a 363182
    I was able to pull up the dimensions of the grease cap you are looking for, part number 363182 and found that it's dimensions match the part # F001518 so this cap would work well for you.
    view full answer...
  • Replacement Dust Cap for Hub of Malone LowMax Trailer
    For the Malone LowMax trailer the correct replacement dust cap is the part # F001518.
    view full answer...
  • Recommended Bearings, Seal, And Grease Cap For Lippert 3500 lb Axle
    According to Lippert, the items in # BK2-100 bearing kit are the correct parts needed to replace the bearings on one hub of your Lippert axle. For a dust cap, you will most likely want the Grease Cap - 1.988" Outer Diameter - Drive In # F001518, but I recommend measuring your hubs to confirm.
    view full answer...
  • Wheel Bearing Cap 1.988 Diameter
    I recommend the TruRyde Grease Cap item # F001518. These grease caps are 1.988" Outer Diameter, have an overall height of 1.156" and a crown height of 0.94 inches. This is the largest crown height available in a 1.988 inch diameter.
    view full answer...
  • Comparing TruRyde and Fulton Grease Caps for Trailer Hubs with 1.988 Inch Bore
    There is basically no difference between dust cap set # RG04-020 and single cap # F001518 other than # F001518 is a single unit and # RG04-020. They otherwise have the same dimensions just from two different manufacturers.
    view full answer...
  • Bearing Buddy Recommendation to Replace a 2-3/32 Diameter Grease Cap
    If the measurement you listed (2-3/32 inches) the only caps we offer that would work would be a Bearing Buddy part # BB2080SS. We do not have any standard grease caps that would fit.
    view full answer...
  • Replacement Grease Cap For Hub With A Pilot Hole Diameter Of 3.125"
    It sounds to me like you are either referring to a grease cap or wheel center cap. The grease cap will be placed into the center of the hub whereas the wheel cap will be placed into the center of the wheel over the hub. In order to ensure you are receiving an exact measurement, you will need to use a digital caliper such as part # PTW80157 to measure this. The most common grease cap for a tent trailer is the Grease Cap part # F001518 with a diameter of 1.988". This is pressed into the...
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  • What Might Cause a Grease Cap to Keep Coming Off of the Hub Assembly On a Boat Trailer
    I would recommend to remove and reinstall the complete trailer hub assembly to make sure all of the parts are installed properly. I am including a link to a video of how to remove and reinstall a trailer hub on a boat trailer. This video will show you how to take off the hub assembly and how to properly put it back on and tighten the spindle nut. The spindle nut on the end of the spindle should be held on with a cotter pin or tang washer. If the cotter pin or tang washer is missing that...
    view full answer...
  • Hub Bore Diameter of Trailer Hub and Drum Assembly AKHD-655-35-K
    The hub bore of Trailer Hub and Drum Assembly # AKHD-655-35-K is 1.980-inches and this allows a good fit with a grease cap like # F001518 which has a flange diameter of 1.988-inches.
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  • Replacement Grease Cap for Gulf Stream Vintage Cruiser Travel Trailer
    Finding a grease cap for your Gulf Stream Vintage Cruiser Travel Trailer will require measuring. You can either measure the outside diameter of one of your existing grease caps or the inside diameter of the hub bore where the grease cap installs. These needs to be a precise measurement so make sure to use a digital caliper like # PTW80157. For example, if the outer diameter measurement was 1.988" you could use the # F001518. Once you have your measurement you can use the link below which...
    view full answer...
  • Recommended Dust Cap for Dexter 10" Hub-and-Rotor Assembly
    The Dexter 10" Hub-and-Rotor Assembly part # K08-435-05 works with the Grease Cap part # F001518.
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  • Grease Caps With Outer Diameter Smaller Than 1.988 Inches
    We do have a grease caps that are smaller than those with a 1.988 outer diameter like the Grease Cap # F001518. In order to know the correct fit for certain you will need to use a digital caliper and take a measurement, but I'll go ahead and list out the smallest size grease caps we offer so you can try and match up the correct size. - 1.957" Outer Diameter: Grease Cap # TRAG-DC-196 - 1.943" Outer Diameter: Fulton Grease Cap # F001524 I have also added links below to video reviews for...
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  • Grease Cap Recommendation for a Trailer Hub part # 34822BX
    Yes, the Grease Cap # F001518 that you referenced is the correct one to use as a replacement for the Trailer Hub part # 8-91-05UC1 that you also mentioned.
    view full answer...

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