Ideal for lowered Softails Stronger than stock springs; prevent bottoming out Big Red springs are recommended for solo riders; rated for 1200 psi (EU: 8,27 MPa) Big Blue springs are recommended if occasionally carrying a passenger or the rider weight is 220-290 lb. (EU: 99,79 - 131,54 kg) ; rated for 1300 psi (EU: 8,96 MPa) Big Gray springs are for lowered machines that often carry passengers or for the rider whose weight is 300+ lb (EU: 136,08 kg+).; rated for 1400 psi (EU: 9,65 MPa) Fit OEM and Progressive Suspension shock absorbers Made in the U.S.A.. SPRINGS SHOCK GRAY 89-07