![]() A “Standard Spindle” hub will measure between 4” and 4-1/16” while a “Short Spindle” hub will measure 3-1/2”. Worn trailer bearings are difficult to hear or feel driving down the road until there is major visible failure. ![]() *Hub Length is the distance through the center of the hub from casting edge to casting edge. Seal Outside Diameter (in): 2.328, 2.561 Inch. If the hub is not available you can measure the spindle from the seal surface shoulder to the beginning of the thread as shown: Easy Grease Trailer Idler Hub Assembly for 2K Axles - 13' to 15' - 5 on 4-1/2 - PreGreased - AKIHUB-545-2-LFEZ-1K Our Price: 33. If the Hub is available to measure, than Hub Length* can be used to determine the difference. Shop Trailer Spindles and Spindle Accessories Today. Most trailer manufactures used and still use what is referred to as a “Standard Spindle” while others used, less commonly, what is referred to as a “Short Spindle”. These spindles are commonly found on axles rated at less than 3,500lbs. Here is a diagram showing the 4 important areas on a 3,500lb spindle:Īnother commonly found spindle is when both bearing Inside Diameter’s are the same and this is called a “Straight Spindle”. The flange is there for Trailer Brakes to be mounted but does not have to be used. This spindle is usually found with a 4-hole brake flange welded to the axle. One of the most common trailer spindles out there is a 3,500lb “Tapered Spindle” (when bearings have different Inside Diameter’s). They are, Seal Surface, Inner Bearing Surface, Outer Bearing Surface, and Thread Surface. There are 4 main areas of importance on the spindle to consider when purchasing a Trailer Hub or Bearings. These are the most common axles found on Boat Trailers, Small to Medium Sized Utility Trailers, Snowmobile Trailers, and more. ![]() There are a few common spindle sizes found on Trailer Axles rated at 3,500lbs or less. Posted Under: Trailer Axles, Hubs & Springs This post was written by ghoj on November 5, 2014 Get the job done with the right part, at the right price.
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