Dual axle vs triple axle

Bumpyroad wrote:

fj12ryder wrote:
Ah, another reason to prefer duals over triples: higher tolls for that extra axle. Honestly I don't see the reason for a triple axle if the weight can be handled by two axles. You hardly see any heavy regular 5th wheels with triple axles anymore, most are two 8,000 lb. axles if they need the carrying capacity.

"Don't try and justify not doing it, extra axle helps in many ways." Please explain how an extra axle helps if two axles can carry the weight? I'm not referring to an over-40 foot trailer, just say, a 38 foot trailer.

I'm starting to get the same old feeling that ego enters in here, rather than necessity. Of course if you NEED the carrying capacity of 3 axles get them, if not why?
bumpy

I agree with the "if you NEED the carrying capacity" thought. I just haven't figured out when that occurs. I got curious and looked at the weight of the Mobile Suite brand. Most of their larger 5th wheels' GVWR run around 20,000-22,000 lbs. and all of them are double axles. Their toyhaulers are triple axles but the GVWR of those is 24,000 lbs.

I'm starting to think that maybe the builders use triple axles so they can get away with using frames that aren't as expensive to build, i.e. smaller beams for frame.