[2airishuman]

there are 3 issues of concern with the tool box, beyond what terry has covered.

1. ground clearance

unless these rear boxes are mounted high, the rear is far more likely to drag.

look how much MORE overhang is created.

the longer trailers are already prone to scraping on many driveways, service station exit ramps and in campgrounds.

why aggravate this issue?

2. reduced carry capacity...

lets assume briefly that sufficient bracing has been added to the frame...

how much does that iron weigh? now add the tool box/contents or genset to the total...

so the 400-500 extra lbs eats into the carry capacity.

and since it isn't OVER the axles the added mass may subtract MORE from carry capacity than the actual weight it adds.

very few a/s models have enough carry capacity as is so...

again who's got carry capacity to use this way?

3. towing/handling/control issues...

as a general rule a/s tow very nicely.

the shape, independent suspension, AND weight distribution and other design features contribute to this...

so moving significant weight this far back will reduce tongue mass (as a %)

and also change the axis of rotation/c.o.g. and forces applied to the axles.

in other words screw up the handling, ride and towing control.

one could load extra weight on the tongue to get mass forward again,

but that only aggravates the weight distribution issue and further stresses the frame and axles...

so to continue, why screw up a great handling trailer?


now to properly address these 3 issues,

one could add higher rated axles, raise the trailer some (and the extension), use truck tires, and beef up the tongue framing...

OR just by a 5'er/toy hauler.

let an a/s remain an a/s...

using a thoroughbred as a pack animal is an injustice to the critter!

cheers
2air'