How to Find the Spindle Number on a Trailer Axle
Question:
How to find the spindle number on my single axle trailer
asked by: Michael G
Expert Reply:
It's not common for the spindle number to be printed anywhere on the axle. That said, if you're looking for new bearings/races and seals all you need to do is note the capacity or measure. The easiest method would be to crawl under the trailer and look for the axle tag on the beam. This should give an axle capacity which we can then use to find the bearings based off industry standards. For example, a 3,500 lb axle uses L68149 and L44649 bearings like what comes with the Hub Bearing Kit for Lippert, Dexter, and Al-Ko Axles part # BK2-100. The other option would be to take the hubs off the trailer and either read the part numbers off the old bearings or measure them with a dial caliper to the nearest thousandth of an inch. I have attached an article that goes over this process in more detail.
I have also attached a link with list of our bearing selection.

Product Page this Question was Asked From
Hub Bearing Kit for Lippert, Dexter, and AL-KO Axles - 3,500 lb with #84 Spindle
- Trailer Bearings Races Seals Caps
- Bearings
- Standard Bearings
- Bearing Kits
- Bearing L44649 and L68149
- Race L68111 and L44610
- 3500 lbs Axle
- etrailer
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: RV Bearing
- Shop: Hub Bearing Kit for Lippert, Dexter, and AL-KO Axles - 3,500 lb with #84 Spindle
- Article: Most Popular Wheel Bearings
- Shop: Dexter Trailer Idler Hub Assembly for 3,500-lb Axles - 5 on 4-1/2 - Pre-Greased
- Shop: CE Smith Trailer Hub Assembly w/ Carrying Case for 2,700-lb Axles - 5 on 4-1/2 - Pre-Greased
- Video: What to Know About the Trailer Hub Assembly
- Shop: Dexter Trailer Hub and Drum Assembly for Heavy-Duty 10K Axles - 8 on 6-1/2 - Oil Bath
- Search Results: trailer hubs and drums
- Shop: Trailer Hub Assembly - 2,200-lb E-Z Lube Axle - 5 on 4-1/2 - 13" - 15" Wheels - Galvanized
- Shop: Easy Grease Trailer Idler Hub Assembly for 3.5K Axles - 5 on 4-1/2 - Pre-Greased
- Video: 3500lb Trailer Idler Hubs Direct Comparison
- Shop: Easy Grease Trailer Idler Hub Assembly for 3.5K Axles - 5 on 4-1/2 - Galvanized
- Video: CE Smith Trailer Hub Assembly w/ Carrying Case for 2,700-lb Axles Spec Review
- Search Results: jm205149
- Search Results: jm511946
- Q&A: What is a #84 Spindle and How Do I Know I Have One On My Trailer?
- Q&A: What is Difference Between Trailer Bearings L44649 vs L44643
- Q&A: Lug Nut Recommendation for Trailer 1/2-20 60 Degree Cone Nut
- Search Results: heavy duty trailer jack
- Article: Trailer Wiring Diagrams
- Video: In-Depth Review of the Dexter Trailer Idler Hub Assembly for 3,500-lb Axles
- Search Results: easy grease grease cap trailer bearings races seals caps
- Search Results: pre~greased trailer hubs and drums
- Search Results: grease
- Video: Hands-On with the Dexter Multi-Purpose Lithium Grease
- Article: How to Mount a Truck Bed Camper
- Shop: Camper Tie-Downs
- Q&A: Should I Use 10 or 12 Inch Brakes on a Trailer with 3,500 Pound Axles and 16 Inch Rims
- Q&A: Recommended Hub for a AL-KO 8490 w/ a 6 on 5-1/2 " Bolt Pattern
- Video: Review of Valcrum Trailer Bearings Races Seals Caps - Black Aluminum Oil Bath Or Grease Cap - VA23JR
Patrick
3/28/2024
Your reply says that you attached an article for measurements. I don't see anything "attached." I need to verify what spindle/axle I have to order the correct 5-5" brake/hub kits.