In my area most dualy trailers have 2-10,000 lb. axles and the tri-axles have 3-7,000 lb axles. Trailers are usually rated by adding the axle capacities and the coupler capacity to get the total capacity. So if it has 2-10,000 axles and a 6,000lb gooseneck couple it would be rated at 26,000 lbs. Then you have to subtract the weight of the trailer to get the available payload. The difference between the 2 is that the tri-axle will be cheaper for several reasons, mainly because since the axles are spaced farther apart from front to back and cover a larger frame section they usually have a lighter frame. They also have 2 less tires and the total cost for 3 axles is less than for 2-10.000's. The disadvantage for tri-axles is they have 2 less tires to carry the same load and they have less square inches of brakes. They are also a lot harder on tires due to the inherent alignment issues with trailer axles. If you can afford it a tandem dualy is a much better deal than a tri-axle setup.
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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