How to Measure a Trailer Spindle
Updated 09/23/2025 | Published 05/22/2014
Question:
I need to find out how to measure a trailer spindle.
asked by: Derek T
Expert Reply:
I have included a picture that shows the measurements needed for a spindle, bearings, seals, faces, and hubs. The spindle measurements are labeled A through F.
A is the spindle shaft diameter
B is where the grease seal sits
C is where the inner bearing sits
D is where the outer bearing sits
E is the thread diameter at the end of the spindle for the nut
F is the spindle shaft length
I have also included a link to our spindle main page for you. The measurements need to be as accurate as possible so you will need to use dial or digital calipers.
Anthony
9/23/2025
F but overall length is 106mm C is 34.7 A is 43.6 No B dimension D is 1 inch E 7/8 15/16 The last two don’t have a digital caliper - tape measure The length in 4areas are starting at mount flange 1” 1 7/8 1” 1 of threaded
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 >
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on Trailer Bearings Races Seals Caps
Michael M.
9/7/2024
I bought a digital caliper from Harbor Frt. so i can you spindle measurements requested as follows A = 1.739 inches B = 138.2 inches C = 1.356 inches D = 1.074 inches E = 0.746 inches F = 1.085 inches I still think that inner bearing hub measurement is about a half inch shorter than my old drum bearing height that i provided in an earlier email. Please call 440 221-9610 if you have questions. Thanks. Joe Veri