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  Here for the journey.  
How to Measure a Trailer Axle
There are a few key measurements required when ordering a new or replacement axle. Accurate 
measurements ensure that the new axle fits perfectly, aligning with the wheels and the frame of 
the trailer for optimal performance. Misalignment can lead to uneven tyre wear, poor handling, and 
potentially dangerous towing situations. 
 ❱Key Measurements
  Hub Face Measurement
The hub face measurement is crucial. It’s the distance 
from the face of one hub to the face of the opposite 
hub. This measurement is taken from where the 
back of the wheel sits against the face of the hub. It 
determines the width of the axle and ensures your 
wheels sit properly under your trailer. 
  Spring Centre Measurement
This is the distance between the centres of the spring 
pads, where the axle connects to the trailer’s leaf 
springs. Accurately measuring the spring centre can 
help you confirm that the new axle will align correctly 
with your trailer’s suspension system.
Additional considerations
•	 Most light commercial trailer axles in New Zealand are a  
standard 55mm box section, however some heavy duty  
trailers will have 65mm box section axles. 
65x65x4mm box section 
(heavy duty <3,500kg)
50x50x5 mm box section 
(standard >2,700kg)
HUBFACE
SPRING CENTRES

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