Replacing Hubs On a 4' X 6' Carry On Trailer From 4 on 4" Lugs to 5 on 4-1/2" Lug Pattern 15" Wheels

Published 10/22/2021

Products Featured in This Question

BT8 Spindle for 2,000-lb Trailer Axles - 1-3/8" Diameter

(71)

$38.30

Grease Seal

(2369)

$11.27

Double Lip Grease Seal - ID 1.249" / OD 1.983" - Qty 1

(643)

$5.40

Easy Grease Trailer Idler Hub Assembly for 2K Axles - 13" to 15" - 5 on 4-1/2 - PreGreased

(1005)

$47.81

Easy Grease Trailer Idler Hub for 2K Axles - 13" to 15" Wheels - 5 on 4-1/2 - Pre-Greased

(1005)

$72.16

Replacement Trailer Hub Bearing - L44643

(2074)

$3.73

Replacement Trailer Hub Bearing - L44649

(2074)

$14.16

BTR E-Z Lube Spindle for 2,000-lb Trailer Axles - 1-1/4" Diameter

(31)

$51.16

Question:

I have a 4 X 6 Carry On trailer with 4 bolt hubs. I would like to change the hubs to 5 bolt to allow 15inch wheels and tires. I am removing and replacing the fenders to facilitate the larger size. I am NOT looking to increase capacity, just get a better ride and use existing 15inch wheels I already have. Are there hubs available that will just swap out the existing to allow this? Thanks for any help or advice you can give me.

asked by: Bill

Expert Reply:

Your current axle on your 4' X 6' Carry on Trailer will likely have either a BT8 Spindle # TRU59FR or BTR Spindle # TRU44FR. You can determine the spindle by removing your current hub and inspecting the bearings or by measuring the spindle itself. I have included a image that shows the locations of the bearing numbers and grease seals on your current hub as well as the measurement points for spindle as well.

The BT8 Spindle # TRU59FR uses Bearings # L44643 which have an inner diameter of 1". The Grease Seal # 34823 has an inner diameter of 1.25". If these are what you have then the Easy Grease Trailer Idler Hub Assembly # AKIHUB-545-2-LFEZ-1K is your replacement idler hub.

The BTR Spindle # TRU44FR uses Bearings # L44649 which have an inner diameter of 1.063". The Grease Seal # 10-9 has an inner diameter of 1.5". If these match what you have the Easy Grease Trailer Idler Hub # AKIHUB-545-2-LFEZ-2K is your replacement idler hub.

Both hub assemblies come with bearings, races, and grease seal installed and packed with grease for a simple installation. If you find that your hub has different bearings or measurements on any of the components please let me know what parts you have and I can find you the correct parts. Also I assumed your 15" wheels are using the 5 on 4-1/2" lug pattern if yours are something different let me know.