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How Can the #42 E-Z Lube Spindle Fit Both a 5.2K and 7K Axles


I see this fits 5.2k and 7k axles. So why does a 5.2k axle and 7k axle beam only have a different part number. What is the difference between the two beam only with both of them same length?


Expert Reply:

There are usually only a few small difference between a 5,200 lb and a 7,000 lb trailer axle but not every two are the same even with the same capacity as different manufacturers make them to different specs. The actual axle thickness can play a role in capacity as well as the brakes/hubs. The #42 E-Z Lube Spindle part # TRU37FR can work with either so long as the inner diameter is 2-1/4".

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