Assume you have the 2011 Avenue Owners Manual?
If not get it here:
Airstream, Inc :: Owners Manuals
Page J-1 has the Capacities/Weight Ratings data.
GVWR (lbs.) 9600
GCWR (lbs.) 16,000
TWR, Maximum (lbs.) 400
GTW (lbs.) 4,000
GAWR-FRONT (lbs.) 4,300
GAWR-REAR (lbs.) 6,084
NCC (lbs.) 1525
UBW (lbs.) 8075
Towing Weight Capacity Hitch/Towing (lbs.) 400/4000
Towing Weight Capacity Hitch/Towing (lbs.) With Distribution Bars 1000/10000
Gross Vehicle Weight Rating (GVWR
) is the maximum permissible weight of the motorhome.
Gross Combination Weight Rating (GCWR
) means the maximum allowable loaded weight of this motorhome and any towed trailer or towed vehicle.
Tongue Weight Rating (TWR)
is the maximum permissible weight of the trailer tongue on the hitch.
Gross Trailer Weight (GTW)
is a maximum permissible trailer weight to be towed.
Warning: The towing vehicle’s braking system is rated for operation at GVWR (GROSS VEHICLE WEIGHT RATING), NOT at the GCWR (GROSS COMBINED WEIGHT RATING). A separate functioning brake system is required for any towed vehicles or trailers weighing more than 1000 lbs. (450 kg) when fully loaded. NEVER exceed the GVWR (GROSS VEHICLE WEIGHT RATING), or the GAWR (GROSS AXLE WEIGHT RATING) specified on a motorhome certification label.
Warning: Do not exceed the Gross Axle Weight Ratings, the Gross Vehicle Weight Rating , or the Gross Combined Weight Rating when loading your vehicle and/or towing a trailer. Failure to heed any part of this warning could result in loss of control of the motorhome and towed
): is the value specified as the load carrying capacity of a single axle system, as measured at the tire-ground interfaces
Net Carrying Capacity (NCC)
is equal to GVWR minus UBW.
Unit Base Weight (UBW
) is the dry weight of the base unit with full fuel and w/o options or fluids.
: The Unit Base Weight (UBW) and the Net Carrying Capacity (NCC) is not the same as the Unloaded Vehicle Weight (UVW) and the Cargo Carrying Capacity (CCC) shown on the Motorhome Weight Information tag in your vehicle. The UBW and NCC weights are for the base unit with no options and fluids except for fuel on motorhomes.
The UVW and CCC on the Cargo Carrying Capacity tag are weights for the individual vehicle as built with its options and certain water capacities.
Based on this data you can easily tow a 4000 lb. trailer with the Avenue. More than that and you will need to use a weight distribution hitch set-up.
With a fully loaded van at 9,600 GVWR you could still tow 6,400 lbs on a weight distribution hitch and stay within the GCVWR of 16,000 lbs.