A tag axle is useful if you plan on carrying lots of weight. In my rig I tow a car and carry what I need and still am well under weight with a 340 Cummings.
Goes up and down mountains just fine.
Hope this helps!
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Dave - Linda
2015 Thor Palazzo 36.1
2010 Honda CR-V Toad - Roadmaster Sterling Tow Bar
FMCA F451520 - Texas Boomers
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