View Single Post
Old 01-16-2007, 10:33 PM   #3
Denny_A
Former TM Owner
 
Denny_A's Avatar
 
Join Date: Jul 2002
Location: Greenville, WI
Posts: 517
Default

Quote:
Originally Posted by andy_in_ma View Post
I know this question has been asked before, but I’ve been “doing the math” and I’m concerned about my situation.
..............snip..........
My tow vehicle is a 2005 Nissan Pathfinder LE. GVWR is 6000#. GCWR is 11133#. .....snip...Adding these up bring my GVW to 5565#.

My maximim tongue weight (GVWR-GVW) is therefore 435#. A tongue weight percentage of 12% this gives me a max TGVW of 3628#, and at 15% it is 2903#.
First... are you going to use a Weight Distribution hitch? If not, then your numbers are approximately correct. If you employ a WDH, then then tongue weight is "redistributed" such that 1/3 (assumes ideal setup) of the tongue weight will be transfered to the trailer's axle. So, if your limit is 435 lbs, then a tongue weight of up to 652 lbs would still keep your Pathfinder axle load within limits. A 'normal' tongue weight of around 510 lbs would result in 340 lbs on the Pathfinder's axles. Gives you a decent margin.

If the TM's axle is limited to 3500 lbs the axle load has to be lowered to 3330 lbs BEFORE the WDH is connected. Vis 510 lbs tongue weight + 3330 lbs axle load = 3840 lbs total trailer weight. When the WDH is cinched up, 170 lbs is added to the trailer axle; ergo TM Axle Weight = 3330 + 170 = 3500 lbs! OTOH, if the axle happens to have a 5000 lb MGAW rating.... the MGW of the trailer is its limiting factor.

Quote:
and I get a TGVW of 3591#. I can tow this at the 12% tongue weight, but not at 15%.
Using a WDH, and assuming a 3500 lb MGAW, then the trailer weight can be around 3850 +- lbs. BTW, the TM is designed to tow best with a tongue weight of 13-14%.


Quote:
1) Is my math accurate?
2) Is this safe?
3) 90 days with only 350# of cargo - am I nuts?
4) I understand that the TM wheel placement puts more weight on the tongue. But it appears from the above that cargo placement will be critical. Comments?
Re 2) Yes, if you use a WDH.
Re 3) 500 lbs, easily! (3850 lbs vs. 3600 lbs)
Re 4) Don't overcompensate by putting really heavy stuff behind the axle. I tended to put the heavy, stuff on the floor ahead of the axle, and the smaller lighter stuff all the way forward. Never had any sway issues, or extreme (either lite or too heavy) tongue weight issues. It's a very stable trailer.

BTW - here's a link to a generic WDH (same one I bought several yrs ago for my '02 2720SL):

http://www.mooretruckaccessories.com...tribution.html

You'll need, at a minimum a 750 lb Standard adjustable WDH. Others here will recommend; my link is for example purposes.

HTH - Denny_A
__________________
2002 2720SL ....
New (old) 2002 Silverado 2500 Duramax Diesel (7/13/07) 2008 Copper Canyon 32' Fifth Wheel TT
Denny_A is offline   Reply With Quote