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What is my "realistic" weight capacity for this steer axle?

My build sheet says I have 14.6k aluminum hubs. 13.2k leaf springs. And what is described as "LT WT F/A; 12k 3.5" drop" axle.

What is the safe capacity for this set up?

By default I am asuming it is 12k.

I have a 55" trailer to side fairing gap with fifth wheel slid all the way to rear setting(center of tandems) . Should I be running this setup at 13k to get trailer closer?

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Forgot to mention, I have "H" rated XZA3+ tires on. And my weight for the axle typicaly runs ~12,250 at the rear most fifth wheel setting giving me that 55" gap. And yes my wheel base is much longer than I expected when I purchased this '12 T700 @ ~245"s.

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The axle is rated at 12k, that's what you can put on it. Most states will let you slide with 12.5 without checking it, State regs listed in the front of your atlas show the different states allowable weight per axle. Also, your tire size can affect your capacity on your steer axle, the only state I can think of off the top of my head that checks this is South Dakota, I go thru there with overwiehgt loads occasionally and they want you to have 295/70s on the front instead of 275/70s...

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Every tire has the weight capacity on the sidewall, a lot of times, same size tires by different manufacturers will have different weight ratings. Also, you can get different ply ratings, a 16 ply (load range H), 275/70r22.5 will carry more weight than a 14ply ( load range G), 295/70R22.5. South Dakota need to check the load rating, not the tire size.

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Most states will allow whatever your steer tires are rated for I have a W900 310WB, with a custom bunk and have a light weight of 25200. I am running 16 ply xza3s on front giving me a 14320 cap, with my forward drive lifted I have14100 with an empty trailer, every now and then a scaleman will walk out and look at tires while I sit on scale but they never say anything after loooking

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I've never been that lucky use to have a Freightliner FLD 120 that always had a weight of 12,800lbs on steering and was ticketed twice once in MO and once in WA

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SCOTT will be eternally grateful.
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