Progressive springs offer a soft initial spring rate for a plush ride Progressively wound design provides increased resistance to bottoming as spring compresses Improve handling while retaining OEM geometry Made in the U.S.A Incluido espaciador de 4.75". Marca : PROGRESSIVE SUSPENSIONReferencia del fabricante : 11-1533Coeficiente dureza de muelle : 0,71 kg/mm - 1,16 kg/mm (40,00 lb/in - 65,00 lb/in)Diámetro exterior : 36,00 mm (1,40")Longitud : 419,00 mm (16,50")Nombre de producto : MuelleTipo : HorquillaUnidades : Pareja