Answer
Sep 10, 2020 - 07:39 AM
With a 1621 bolt hole mounting pattern and a GVWR of less than 11,500 lbs, you would want to use the RPB72-1621HD-03. The RPB72-1621SDH-06 would match the bolt hole mounting pattern, but you would not see the benefit of the rubber shear spring. The shear spring inside the pin box uses the weight of the trailer to move the spring when starting/stopping/going over expansion joints. 10k would not be enough to get the #6 shear spring to move. The #3 is the appropriate spring for anything 11,500 lbs or less. Please confirm the bolt hole mounting pattern using the attached drawing.
https://www.rvupgradestore.com/v/vspf...
https://www.rvupgradestore.com/v/vspf...
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