garysol wrote:
I The trailer is sitting just a little front high with the head bolted into the lowest hole. I measured the drop of the supplied shank at 7". So here is my question. Are all shanks universal as to the spacing of the holes? Will my Pro Series head bolt up to any solid drop shank or is the bolt spacing and shank width brand specific. Here are a few pictures.
Hi,
First, just letting you know you stated " measured the drop of the supplied shank at 7"
There is industry standard language about rise and drop of a shank in ratings and it will differ between a round bar hitch and a trunnion bar hitch.
The 7" you measured looks more like the physical length of the end of the shank with the holes in it. Is that correct?
The shank you have now looks by eye from your pic to be a 2" maybe 2 1/2" drop in the way the ratings are declared.
The shank drop or rise amount of a WD shank is the distance from the ball mounting surface to the top of the 2" square shank. Notice I stated ball mounting surface which is on the hitch head.
See this shank from Curt
https://www.etrailer.com/Accessories-and-Parts/Curt/C17122.htmlThe holes are spaced on 1 1/4" settings. Measure your hitch head bolt center and check that 1.25" will divide equally into the hitch head bolt center.
Your hitch head is a round bar hitch, so the shank I listed is rated at 7" of drop for a round bar hitch. You can most likely get by with less than the 7" drop, but what I showed you is how to determine the ratings of shanks and how to make sure the bolts fit your shank.
Etrailer has many shanks that will work. The Curt brand will work with the all steel hitch head you have. They also sell Reese brands and many others. A good place for hitch parts
Hope this helps
John
2005 Ford F350 Super Duty, 4x4; 6.8L V10 with 4.10 RA, 21,000 GCWR, 11,000 GVWR, upgraded 2 1/2" Towbeast Receiver. Hitched with a 1,700# Reese HP WD, HP Dual Cam to a 2004 Sunline Solaris T310R travel trailer.