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