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When youre looking to upgrade the wheels on your trailer or you need new trailer wheel hubs you need to know the lug pattern to determine the correct size. This video shows you different different hub sizes and also shows you some easy methods to find out which one you will need.
This hub face or track width measurement will tell you.
How to measure trailer hub size. This video illustrates how to figure out the size of your trailer hub so you can get the appropriate sized replacement. A very common designation for boat trailer hubs would be 5 on 45 or 545 for short. This means that the hub has 5 bolts spaced evenly on a 45 circle.
To determine your bolt pattern first count the number of bolts per hub. Then measure from the center of the hub to the center of one bolt and multiply that number by two. To determine the size of the hub assembly you need to purchase you have to determine which bearings are in the old assembly.
If the old assembly has L44649 inner bearings you would use the hub you chose 8-258-5UC1. If the inner bearings are marked L44643 you will need 8-258BTUC1. If you do not have the old bearings you need to measure the.
If the numbers cannot be found on the bearings then we can measure the spindle but that needs to be done using a dial or digital caliper to measure 3 decimals or thousandths. Here is a link to all the 6 on 5-12 hubs and drums we have. Then on the good side measure from the spring center to the outside hub face.
Multiply that measurement times two and add it to the spring center measurement to obtain your hub face length. If you dont happen to have the hub on the good side of the broken axle but the good side is otherwise unharmed you can still get the measurement. 14 rows Identify the number and size of studs on your hub Measure the PCD Pitch.
It is best to measure the spindle and hub with a digital caliper like part PTW80157. The tirewheel combo you mentioned part AM3H490 is rated to be able to handle a maximum load of 1650-lbs at 90 psi. The pilot hole on the combo is 28-inches diameter.
Unfortunately theres no way for me to know what bearing size the hub on your 1958 boat trailer uses. You will need to pull one of the existing hubs and check for a number stamped inside the bearings themselves or measure along the spindle where they sit to get their inner diameters. To find the correct Bearing Buddy grease cap for your Rockwood camper trailer you can measure either the hubs bore please see linked photo where the grease cap installs or you can measure the existing grease caps outer diameter.
The hub is a more reliable place to measure since a grease cap can be deformed when it is pulled from the hub. The numbers on the back of a trailer bearing correspond to a certain spindle size and this is the easiest way to determine the correct hub. If a number is not legible on the bearing then you will need a micrometer to measure the inside dimension of the bearing.
Determine the correct seal. To determine your trailers track width measure from the center of one tire to the center of the opposite tire on the other end of the same axle. A more precise measurement can be obtained by measuring the distance from the hubs face to the other ends hub face.
This hub face or track width measurement will tell you. If the trailer hubs have an even number of bolts holding the wheel measure from the center of one bolt to the center of the bolt directly opposite using a ruler tape measure or caliper. The hub lug bolt pattern will be determined by the number of lug bolts and the distance between the opposing hub bolt see 4-lug hub diagram.
All but 5-lug patterns are measured in this manner. If your trailer wheel hubs have 5 lug bolts measuring is slightly different. Choose any lug bolt and measure.
Boat Trailer Hub Size Chart. By Eva September 21 2020. Genuine parts new hubs for boat trailer the hull galvanized boat trailer axle 79 hub trailer wheel bearings and races at most por trailer wheel bearings.
Trailer Parts Super Hub Technical Information. How To Determine the Size of Replacement Hubs - YouTube. This video shows you different different hub sizes and also shows you some easy methods to find out which one you will need.
Most 4 lug hubs have a 4 bolt circle and most 5 lug boat trailer hubs have a 4 ½ bolt circle diameter. Cargo and utility trailers with 5 lug hubs are commonly found with a 5 bolt circle. To correctly measure the bolt circle of a hub measure from the center of the hub to the center of a stud and multiple that measurement by two.
Also consider spindle size when reusing existing hubs or drums. Trailer Axle Hub Face. Trailer axle hub face is the distance from the outside of hub mounting flange to outside of hub mounting flange measured one-half way between top and bottom of the hub.
The hub face is also known as the mounting surface where the wheel studs are located. How to measure a trailer axle. Hub face and spring centerby best trailers out of Macon GA478-788-9039866-403-9798.
Maximum trailer width. In Australia the maximum trailer width is 25 metres. Measure the overall length of the axle including the end of the spindle.
To do this wheels and any hubs must be removed. This is called a tip-to-tip measurement. I usually measure A and B dimensions by holding the hub lock nut against a flat surface like the edge of my work bench then measuring from there back to the hub flange with a ruler or caliper.
Note that you must hold the lock nut not the axle end against the edge. How to Measure a Trailer Axle. The measurement from the face of one hub to the face of the other.
The face is where the wheel sits against the hub Spring Center. The measurement from the center of one spring pad to center of the other. Generally adding 2 to the Spring Center measurement can determine the Frame Width Also check out the common axles sizes.
While these axle sizes are readily available at most places That doesnt mean we cant get different sizes. When youre looking to upgrade the wheels on your trailer or you need new trailer wheel hubs you need to know the lug pattern to determine the correct size. Typical trailer wheel sizes range from 14-to-18-inch with 4 lug 5 lug 6 lug or 8 lug patterns.
The lug pattern measures the diameter around the circle formed by the lugs on the wheel. Wheel Type Stud Stud Inches MM Centre to Centre of Centre to Centre of Diameter Number PCD PCD Adjacent Studs Adjacent Studs Gemini 716 4 10000 2 1316 707 Mini 716 4 4 10160 2 1316 7184 Capri 716 4 4 14 10795 3 7633 CortinaTelstar 716 4 4 14 10795 3 7633 Datsun 1600 716 4 4 12 11430 3 316 8082 Early Ford 12 4 4 12 11430 3 316 8082.