Hi Steve
In this case it is good to have an actual known loaded tongue weight. If your loaded tongue weight is in the 500# area, your into a WD hitch unless you have a real heavy truck along with a heavy duty receiver that can handle the weight carrying ability of not needing WD.
What is your truck and do you know what the WD rating of the truck receiver is?
If one is sizing up a hitch and you have a known 500# loaded tongue, then with the right adjustable hitch head and WD bar adjustments you can use a 600#, 750 or 800# system and be just right. The ride is about the best when the tongue weight is at or just under the WD bar rating. A WD bar over the rating works too but the higher you get over the rating the harsher the ride can be on the lighter TT's.
If you have 1,700# WD bar and a 1,200# tongue weight that is workable and not to harsh a ride. However a 1,000# WD hitch with an actual 400# tongue weight may create a harsh ride and if the TT frame is real light may create other issues. But if you have a 700# tongue weight then 1,000# bars work OK too. Again this is easier to give a more close answer if you are armed with actual loaded weights.
I do agree you need to have a form of anti sway control on any TT.
There are now options out there that have anti sway control and WD built in.
See this hitch I saw from the makers of the higher end Equal-I-zer hitch. Fast way is a division of Progress Mfg. I saw this one up close at a dealer a few months ago and it looked like a good option for smaller TT's
Fastway Trailer Products - Home
E2 Weight Distribution with 2-Point Sway Control 800 / 8,000 lb Round Bar - RVWholesalers.com RV Parts
That combined price of $265 for a round bar 800# WD hitch with integrated anti sway control can be cheaper then a $260 1,000# system that then needs an add on friction sway bar and the 800 # more closely matches your tongue weight
They also make a 600# one for $4 bucks less.
E2 Weight Distribution with 2-Point Sway Control 600 / 6,000 lb Round Bar - RVWholesalers.com RV Parts
You need to add the tow ball to go with both of them. They can be in the $20 range
Reese makes a SC hitch too but it lists for more. Here a 600# SC hitch is $499.
Reese SC Weight Distribution System w Sway Control - Trunnion - 10,000 lbs GTW, 600 lbs TW Reese Weight Distribution RP66151
Hope this helps
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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