Replacement Hub and Bearings for Boat Trailer
Updated 07/10/2026 | Published 07/06/2026
Products Featured in This Question
Question:
I am replacing the hub and bearing on a boat trailer. The old hub is a bt-100 that goes on a 1 inch straight shaft. The bearing is L44643 inner and outer. Dont see a number on the seal. Can you give me part s for replacement kits. Possibly pre-greased with marine grade grease. Also ungreased.
asked by: Robert F
Expert Reply:
Hey Robert! For pre-greased hubs you can use the # TRU78AV with a 4 on 4 bolt pattern or # 34822545BX with a 5 on 4-1/2 bolt pattern. If you want ungreased, the best route is the galvanized hubs # AKIHUB-440-2-G-EZ-1K (4 on 4) or # AKIHUB-545-2-G-1K (5 on 4-1/2). All of these are designed to fit your spindle with # L44643 inner and outer bearings.
What kind of boat trailer do you have?
(click to enlarge)
Product Page this Question was Asked From
Trailer Idler Hub Assembly for 2,500-lb Axles - 4 on 4 - L44643 Bearings - Pre-Greased
- Trailer Hubs and Drums
- Idler Hub
- Pre-Greased
- Standard
- L44643 / L44643
- Standard Grade
- For 2500 lbs Axles
- 1/2 Inch Stud
- 4 on 4 Inch
- 8 Inch Wheel
- 10 Inch Wheel
- 12 Inch Wheel
- 13 Inch Wheel
- 14 Inch Wheel
- TruRyde
more information >
Continue Researching
- Shop: Trailer Idler Hub Assembly for 2,500-lb Axles - 4 on 4 - L44643 Bearings - Pre-Greased
- Video: All About the Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel
- Video: Review of TruRyde Trailer Hubs and Drums - Trailer Idler Hub Assembly 2500 lb Axle - TRU78AV
- Shop: Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel - 4 on 4 - Load Range C
- Video: etrailer 2,000-lb Axle Idler Hub Assembly Install Guide - Boat Trailer
- Video: Talking Pre-Greased Trailer Hub and Drum Assemblies with TruRyde
- Shop: Loadstar ST175/80D13 Bias Trailer Tire with 13" Galvanized Wheel - 4 on 4 - Load Range C
- Video: Feature Review Loadstar ST175/80D13 Bias Trailer Tire with 13" Galvanized Wheel
- Shop: Trailer Idler Hub Assembly for 2,000-lb Axles - 4 on 4 - Galvanized
- Q&A: Will Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel Fit 4 on 4-1/2 Hub
- Q&A: Can a 175/80R13 Tire be Used as a Spare for a Trailer with 185/80R13 Tires?
- Shop: Loadstar ST175/80D13 Bias Trailer Tire with 13" Galvanized Wheel - 5 on 4-1/2 - Load Range B
- Shop: Loadstar ST175/80D13 Bias Trailer Tire with 13" Galvanized Wheel - 4 on 4 - Load Range B
- Q&A: How Much Grease is Required for Pre-Greased Trailer Hub and Drum Assembly Installation
- Shop: Provider ST175/80R13 Radial Trailer Tire w/ 13" Vesper White Mod Wheel - 5 on 4-1/2 - LRC
- Q&A: Proper Way to Tighten Trailer Spindle of Castle Nut
- Q&A: How Tight Should Spindle Castle Nuts be Tightened
- Search Results: trailer hitch
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Article: Trailer Wiring Diagrams
- Shop: Trailer Hitch
- Search Results: trailer tires and wheels
- Q&A: Installation Time for Blue Ox BX1128 Flat Tow Base Plate Kit for 2016 Jeep Grand Cherokee
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Trailer Wiring
- Search Results: trailer wiring
- Shop: Suspension Enhancement
- Article: How to Measure Your Trailer Wheel Bolt Pattern
- Article: How to Measure for Trailer Hitch Drop
- Shop: Brake Controller
on Trailer Hubs and Drums
