| Spring Rate | Wheel Rate | Antiroll Bar | Wheels | Tires | Shocks | Ft.Lower | in N/mm | in N/mm | Dia. in mm | in X in X mm offset | | | Bushings | Front Rear | Front Rear | Front Rear | Front Rear | Front Rear | | ------------------------------------------------------------------------------------------------------------------------ 1984 FE1 63.5 72.0 21.5 28.6 24 S 20 S 15x7x17 15x7x17 215/65R15 215/65R15 1 N 16x8.5x32 16x8.5x32 255/50VR16 255/50VR16 1 N Z51 102.0 87.5 28.6 37.5 25 S 23 S 16x8.5x32 16x9.5x38 255/50VR16 255/50VR16 1/4 HD 1985 FE1 54.0 39.9 17.5 24.1 24 S 20 S 16x8.5x32 16x8.5x32 255/50VR16 255/50VR16 1/3 N Z51 63.5 57.2 26.0 30.6 30 S 24 S 16x9.5x38 16x9.5x38 255/50VR16 255/50VR16 1/4 HD 1986 CPE FE1 51.8 39.9 18.0 24.1 26 T 20 S 16x8.5x32 16x8.5x32 255/50VR16 255/50VR16 1/3 N Z51 66.5 57.2 26.0 30.6 30 S 22 S 16x9.5x38 16x9.5x38 255/50VR16 255/50VR16 4 HD CNV FE1 54.4 39.9 19.0 24.1 26 T 19 S 16x8.5x32 16x8.5x32 255/50VR16 255/50VR16 2/3 N 1987 CPE FE1 51.8 39.9 18.0 24.1 26 T 20 S 16x8.5x32 16x8.5x32 255/50VR16 255/50VR16 1/3 N Z52 51.8 39.9 18.0 24.1 30 S 20 S 16x9.5x38 16x9.5x38 255/50VR16 255/50VR16 3 N Z51 66.5 57.2 26.0 30.6 30 S 22 S 16x9.5x38 16x9.5x38 255/50VR16 255/50VR16 4 HD CNV FE1 54.4 39.9 19.0 24.1 26 T 19 S 16x8.5x32 16x8.5x32 255/50VR16 255/50VR16 2/3 N Z52 54.4 39.9 19.0 24.1 26 T 20 S 16x9.5x38 16x9.5x38 255/50VR16 255/50VR16 3 N 1988 CPE FE1 93.1 39.9 26.7 25.7 26 T 22 S 16x8.5x50 16x8.5x50 255/50ZR16 255/50ZR16 1/3 N Z52 93.1 39.9 26.7 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N Z51 115.5 57.2 30.8 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 4 HD CNV FE1 93.1 39.9 26.7 25.7 26 T 22 S 16x8.5x50 16x8.5x50 255/50ZR16 255/50ZR16 2 N Z52 93.1 39.9 26.7 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N 1989 CPE FE1 93.1 39.9 26.7 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N FX3 93.1 39.9 26.7 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N Z51 115.5 57.2 30.8 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 4 HD Chal. 115.5 57.2 30.8 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD CNV FE1 93.1 39.9 26.7 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N FX3 93.1 39.9 26.7 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N 1990 CPE FE1 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N FX3 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N ZR1 96.2 39.9 27.1 25.7 26 T 26 S 17x9.5x56 17x11x36 275/40ZR17 315/35ZR17 5 N Z51 115.5 57.2 30.8 33.5 30 S 26 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 4 HD R9G 115.5 57.2 30.8 33.5 30 S 26 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD CNV FE1 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N FX3 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N 1991 CPE FE1 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N FX3 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N ZR1 96.2 39.9 27.1 25.7 26 T 26 S 17x9.5x56 17x11x36 275/40ZR17 315/35ZR17 5 N Z07 115.5 57.2 30.8 33.5 30 S 26 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD CNV FE1 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N FX3 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N 1992 CPE FE1 73.2 39.9 23.9 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N FX3 73.2 39.9 23.9 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N ZR1 75.4 33.0 25.4 22.6 26 T 26 S 17x9.5x56 17x11x36 275/40ZR17 315/35ZR17 5 N Z07 90.1 57.2 29.4 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD CNV FE1 73.2 39.9 23.9 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N FX3 73.2 39.9 23.9 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N 1993 CPE FE1 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17 285/40ZR17 3 N FX3 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17 285/40ZR17 5 N ZR1 75.4 33.0 25.4 22.6 26 T 26 S 17x9.5x56 17x11x36 275/40ZR17 315/35ZR17 5 N Z07 90.1 57.2 29.4 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD CNV FE1 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17 285/40ZR17 3 N FX3 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17 285/40ZR17 5 N 1994 CPE FE1 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 3 N FX3 60.0 26.0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 5 N ZR1 75.4 33.0 25.4 22.6 26 T 26 S 17x9.5x56 17x11x36 275/40ZR17 315/35ZR17 5 N Z07 90.1 57.2 29.4 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD CNV FE1 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 3 N FX3 60.0 26.0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 5 N 1995 CPE FE1a 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 3 N FE1b 60.0 26.0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 3 N FX3 60.0 26.0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 5 N ZR1 75.4 33.0 25.4 22.6 26 T 26 S 17x9.5x56 17x11x36 275/40ZR17 315/35ZR17 5 N Z07 90.1 57.2 29.4 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD CNV FE1a 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 6 N FE1b 60.0 26.0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 6 N FX3 60.0 26.0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 5 N 1996 CPE FE1 60.0 26..0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 3 N FE1GS 60.0 26..0 19.0 18.0 26 T 26 S 17x9.5x56 17x11x50 275/40ZR17 315/35ZR17 3 N F45 60.0 26.0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 7 N F45GS 60.0 26.0 19.0 18.0 26 T 26 S 17x9.5x56 17x11x50 275/40ZR17 315/35ZR17 7 N Z51 73.2 33.0 23.9 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 4 HD Z51GS 73.2 33.0 23.9 25.7 26 T 26 S 17x9.5x56 17x11x50 275/40ZR17 315/35ZR17 4 HD CNV FE1 73.2 39.9 23.9 25.7 24 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 6 N F45 73.2 39.9 23.9 25.7 24 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 8 N CODES S-Solid antiroll bar T-Tubular antiroll bar 1-Delco shock 2-Delco shock, convertible specific 3-Delco/Bilstein gas shock 4-Delco/Bilstein gas shock, Z51 specfic 5-Ride-adaptive Delco/Bilstein gas shock 6-Delco/Bilstein gas shock, convertible specific 7-Delphi bi-state ride adaptive gas shock 8-Delphi bi-state ride adaptive gas shock, convertible specific N-Normal, front, lower control arm bushings (ft. 11k n/mm, rr 2.3k n/mm) HD-Heavy-duty, front, lower control arm bushings (ft 13.5k n/mm, rr 3.5k n/mm) E-EMT tire available, a-early b-late GS-Grand Sport