48 ft Spread axle???

It allows no more gross weight. It's still only 80k gross. However, EVERY state allows 40k(or more in specific cases)on the spread so much easier to get the axle weight right.

 

Not true, it is true not every state will let you add to your gross weight but, these do: WA, MT, OR, ID, WY, NV. They will allow you to license and haul up to 84,000. There are a few more states that allow the bump.

 

You can get those same weights licensed on a normal tandem axle. It does not have to be a spread.

 

I was under the impression that at least in California, you are only allowed 34k on tandems but if you have at least 8 feet between axles you can get 20k per axle. You are correct about the 80k rule but scaling in California is also based on distance between front and rear axles except for the national network. I could be wrong on all accounts. Comments?

 

Ok, I give up, you win. There is absolutely no difference or benefit to pulling a 48" spread. You are correct. You da man.

 

I did not say there was no benefit. I said that it's no difference on the gross weight you can haul. there are huge advantages to a spread.

 

this jist of this is correct. Without looking it up I don't know exactly how California does it, but many states have different laws about axle spacing, and king pin to rear axle distance. And even axle weight.

 

I think in California you can only have 40 feet kingpin to rear axle on trailers longer than 48 feet. I believe that is true for certain Canadian provinces as well