Spring Assist Parts for Trailer Ramp Doors. Easy assemble packs with common Ramp Door Spring Assist parts so you can assemble your own mechanism to fit door weight and size for your different trailers. BAR NOT INCLUDED. Each set conveniently packed in easy to store and ship-able Patent Pending carton. Each Spring Assist Pack includes the following:
1 piece Torsion Spring (60 / 80 / 120 / 160 lb spring ratings)
1 set (2 pcs) left and right side 12′ Cable Drums
1 set (2 pcs) 150″ x 1/8″ Stainless Steel Winding Cables
1 set Bearing Brackets for roof mounting
1 set Nylon Rollers
1 pack of Assembly Hardware
Available with springs of various weights for use on 6, 7 and 8 foot wide doors. Please match to door by spring weight and not necessarily door width. You must supply your own BAR.
All packs clearly marked, labeled and barcoded for resale.