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Old 06-03-2015, 03:49 PM   #11
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being in the industry, i was surprised to hear about 4400 pound axles. i wondered what bearings ect they would have and what size brakes since I hadnt seen one yet. but this makes perfect sense...how to get to a heavier rating without having to go the 12 " brakes and larger bearings...you right though...you only as strong as your weakest link...3500 pound bearings and brakes and even spindle diameter for that matter...
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Old 06-03-2015, 04:19 PM   #12
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wheel bearing gone, destroyed hub.

I have a 3500 pound alko axles under my toy hauler and was looking into putting possibly a bigger one under. I did a ton of research and the only difference in a 3500 pound and 4400 was the outer bearing and a 2 3/8 inch tube compared to a 3 inch. But a 3500 pound axle could be ordered with a 3 inch tube. Even leaf springs were the same. Didn't make sense at all to me either. Even on the 5200 pound axle the spindle diameter was the same as a 3500 but obviously brakes were bigger. So for that matter and reading all this and scratching my head although some probably tell me I'm crazy I typically will run close to max weight and have been slightly over with my toy hauler. I check the heat on my bearings every time I stop and they are still cool. And my tires are overrated so no concern there.


2012 Sandstorm 203SLC
2013 Toyota Tundra Crewmax 5.7
2014 Honda Pioneer 700-4
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2012 Sandstorm 203slc
2013 Toyota Tundra
Eqil-l-izer hitch,Prodigy P3
2014 Honda Pioneer 700-4
2004 Yamaha Grizzly 660
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Old 06-03-2015, 06:59 PM   #13
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the outer(smaller of the 2) bearing on the 5200 pound is the same size as the inner(larger)bearing on the 3500. so, the spindle is heavier through this area(loaded area) till you hit the nut.
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