My Reese sheet shows for the trunnion type spring bars:
550 lbs (pair) rating - 1" square (now 600 lbs)
750 lbs (pair) rating - 1 1/8" square (now 800 lbs)
1,000 lbs (pair) rating - 1 1/4" square (my hitch) (now 1,200 lbs)
The current catalog has different steps.
When selecting the spring bars, the cargo load anticipated for the rear
of the tow vehicle needs to be taken into account in addition to the
tongue (hitch) weight of the trailer.
DETERMINING THE CORRECT WEIGHT DISTRIBUTING HITCH:
Determine the tongue weight of the trailer. Tongue Weight includes the
trailer tongue weight with full gas, water, waste systems and a packed
trailer.
Estimate the car trunk load (includes all items carried in the back of
the vehicle).
Match the sum of these weights to the proper EAZ-LIFT Hitch. For example,
a tongue weight of 500 lbs., coupled with a car trunk load of 200 lbs.,
equates total hitch weight of 700 lbs.
>From the Guide, the "example" vehicle-trailer combination would require a
750 Weight Distributing Hitch. If there is a future possibility of buying
a heavier trailer, it may be wise to select a heavier Weight Distributing
Hitch.
Make sure the tongue weight and the gross trailer weight do not exceed
the tow vehicle manufacturer's recommended capacities.
The hitch selected must have a maximum Gross Trailer Weight rating equal
to or greater than, the trailer rating.
Tongue weight should be at least 10% of gross trailer weight.
Copyright ) 2000-2003 Eaz-Lift Spring Corporation