R and P Carriages | Cargo, Utility, Dump, equipment, Car Haulers, and Enclosed Trailers in Chicago, Ottawa, Dekalb, and Joliet, IL

How to determine what axle you have

Most common utility trailer axles fall into two types, and only three sizes.

Rubber Ride Torsion (no springs)

Conventional Leaf Spring (either straight or dropped)

    • Typical Rating
    • Axle tube OD Size(spring axle only)
    • Spindle Number
    • Outer Bearing ID Size
    • Inner Bearing ID Size
    • Seal ID Size
    • Brake drum Size (Bolt pattern)
    • Dust cap ID Size
    • 2000#-2200#
    • 1.75"
    • BT8 orBTR
    • 1.000" (L44643) 1.063" (L44649)
    • Same as Outer Bearing
    • 1.25" (12192TB) or 1.50" (10-60)
    • 7" (4x4 or 4x4.5)
    • 1.78 or 1.98"
    • 3500#
    • 2.375"
    • #84
    • 1.063" (L44649)
    • .375"(L68149)
    • 1.75" (10-19)***
    • 10" 5 Lug (4.5"/4.75"/5.0"/5.5") + (6x5.5")
    • 1.98"
    • 5200#-7000#
    • 3.00"
    • #42
    • 1.25" (15123) (LD)*1.25" (14125A) (HD)
    • 1.75" ( 25580)
    • 2.125 (10-10)*2.250  (10-36)
    • 12" (6x5.5" or 8x6.5")
    • .44" or2.71"

Remember, the above colors are just a GUIDE. your colors may be different, read the instructions!

As you can see, there are only 3 basic sizes of axles

With 4, 6 and 8 bolt Wheels, just measure across to the opposite lug to get the bolt circle. On 5 bolt wheels, you must use the chart below to figure your bolt circle:

How to measure your axle, (to order a replacement)

* Notes:
  • There are many other less common axles out there, this covers "Most" axles 7000# and lighter
  • Mobile home axles may or may not use standard parts, you have to look inside yourself.
  • The large #42 spindle can have either 2.25 or 2.125 ID seals, you have to check.
  • Not all axles have brakes, but the bearing sizes are still the same, either brake or idler.
  • Rarely, I have seen a LM67048 Outer bearing used on the #42 spindle (light duty)

*** on Some Square Tube axles, found almost always on Boat Trailers (EZ Loader, Ranger, etc) Made by UFP, the grease seal will be slightly smaller ID of 1.68". If you have a boat trailer with a square tube axle, check your seal size before ordering.