Trailer rear ramp gate assist springs used on Siems utility trailers but could very well work on other brands also. Helps take much of the weight off of a heavy rear drop down loading ramp. Replace a broken assist spring on your Siems trailer or add one to your existing rear ramp gate. 5 1/2" wide and 2 1/2" diameter with a 1 1/2" center hole. $60 each.
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Also available are some larger springs used on goose neck trailer and heavy equipment trailer fold-over ramps. These are $80 each