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How to Measure the Hub Face of an Axle & the Spring Center

When calling about axles there are a few things we will need to know:

  1. What kind of axle do you have? torflex straight or drop
  2. Is the axle grease, EZ lube, never lube or oil?
  3. What is the capacity of each axle?
  4. What is the hub bolt pattern? For how to measure bolt patterns see the resource page.
    1. 4-4.0
    2. 5-4.5
    3. 5-4.75
    4. 5-5.0
    5. 5-5.5
    6. 6-6.5
    7. 8-6.5 (studs 1/2″, 5/8″ or 9/16″)
  5. What is the hub face?
  6. What is the spring center?
  7. What kind of brakes do you have? idler (no brakes) electric, hydraulic, or disc
  8. What is the spring orientation? over or under
  9. What type of spring does the axle have and do you need new springs with the axle?