difference between pro series 49901 vs 49903

    I think that would be only strength of hitch in that it would handle a 10,000 lb. trailer,it would not effect how trailer or TV handled while towing. We use the Equalizer WDH with 4 point sway control. We used the 4,000 lb - 400 lb. rated hitch with the 171 r-pod and with our Vibe we use the 6,000 lb.- 600 lb. rated hitch.    Watching the Video of the trailer that was blown over by the wind that is something the r-pods and Vibes have a advantage with in having the wheels on the outside of the trailer, it gives more stability. 

I want to address Pawntan's second post and question-he said

"this sentence (from article above)  really cause me to scratch my head. I need an illustration, and example how can it be dangerous.
"For example, if the weight distribution system has a 1,000 pound (454 kilogram) tongue weight capacity but the trailer is loaded with only 300 pounds (136 kilograms) of tongue weight with 50 pounds (23 kilograms) of cargo in the trunk of the towing vehicle, you're about 650 pounds (295 kilograms) under the rating. That can make the distribution unpredictable and dangerous"

It really does not make any sense.  I agree that it can have stiff ride, but unpredictable/dangerous reasoning just does not make some sense.

 I need some explanation like "imagine... ""

I think this sentence is addressing a light tongue weight and how it affects the weight distribution system. A weight distribution system works by transferring(distributing) part of the tongue weight forward to the front axle of the tow vehicle and back to the trailer axle. tongue weight is important in the overall handling of the trailer.  If the tongue weight is too light, the trailer will tend to have more sway and be less stable while being towed.  So it stands to reason that if the tongue weight is too light, the weight distribution system is also not functioning properly because there is not enough force(weight) to be distributed back to the tow vehicle front axle or trailer axle.

This is another example of buying a weight distribution system that is too strong  for the intended purpose.  As a result, it doesn't work as effectively as desired.

I hope this helps
Vann

If I am being asked, I use a Reese Hitch, with 550lb round bars. I do not use hitch mounted sway control.

Again.. the only difference between these two kits is the size/rating of the transfer bar. DO NOT buy an oversized bar. Get the 550/600 lb kit for your pod. If in the future you buy a much larger heavier TT, all you have to do is source the round bars with the heavier rating.

When I was choosing my WDH I contacted the Equalizer/E2 manufacturer (they make both) and they confirmed there would be no problem going with a higher-rated WDH.  I went with the 6000/600 instead of the 4000/400.  I wouldn't go with a 10,000/1000 model, that would be too stiff IMO.  If you think you'll move up to a larger camper in the future then go with a 6000/600 model.

Thank you all for the help.
Now I have another decision to make. Can you please share your experience ?

See:
http://www.rpod-owners.com/forum_posts.asp?TID=5873&PID=57106#57106