R and P Carriages


Home Trailers Parts Rentals Help Section Contact Us
How to determine what axle you have:

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


The two axle types:

Rubber Ride Torsion (no springs)

Conventional Leaf Spring (either straight or dropped)



The Three Basic Sizes:
Typical
Rating

Axle tube
OD Size

(spring axle only)
Spindle
Number

(see chart below)
Outer Bearing
ID Size

Inner Bearing
ID Size

Seal ID
Size

Brake drum
Size (Bolt pattern)
(See chart below)
Dust cap
ID Size

2000#-2200#
1.75"
BT8 or
BTR
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)
1.375"(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")
2.44" or
2.71"


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.



Home | Trailers | Parts | Rentals | Help Section | Contact Us
Questions? Email the Webmaster!
Copyright© R and P Carriages 2014