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Progressive 12 Series Shock Springs

(1 review)

Item: 324977

Fits: 1975 Honda CB550K 550 Four

$80.06 – $95.44

Progressive 12 Series Shock Springs


  • 12 Series shock springs are required when ordering Progressive Suspension 12 Series shocks. 12 Series shock springs can also be used to replace the springs in Progressive Suspension 412 Series shocks.
  • Various rates allow fine tuning for specific needs
  • Sold in pairs
  • Made in the USA

Product Note: Fits Progressive 12 Series or 412 Series shocks only.

Specification Details
Color Varies (make selection above)
Finish Varies (make selection above)
Position Varies (make selection above)
Quantity 2
Spring Rate Varies (make selection above)
Stock Length Varies (make selection above)

Vehicle Fitment


Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

BMW
  • R 100 1979-1984
  • R 60/6 1974-1976
  • R 65 1979-1984
  • R 75/5 1973
  • R 75/6 1974-1976
  • R 75/7 1977
  • R 80/7 1978-1981
  • R 90 S 1974-1976
  • R 90/6 1974-1976
Ducati
  • 860 GT 1975-1977
  • 900 GTS 1977-1979
  • 900 SS Desmo 1976-1982
  • Pantah 500 SL 1980-1983
  • Pantah 600 SL 1980-1984
Honda
  • CB1000 1994-1995
  • CB1000C Custom 1983
  • CB1100F Super Sport 1983
  • CB350 Super Sport 350 1968-1973
  • CB350F 350 Four 1973-1974
  • CB360 1974-1976
  • CB400F Super Sport 400 Four 1975-1977
  • CB450K Super Sport 450 1968-1974
  • CB500K Four 1971-1973
  • CB500T 500 Twin DOHC 1975-1976
  • CB550F Super Sport 550 Four 1975-1977
  • CB550K 550 Four 1975-1978
  • CB650 1979-1982
  • CB650C 650 Custom 1980-1981
  • CB650SC Nighthawk 650 1982-1985
  • CB750 Nighthawk 750 1991-1993, 1995-2003
  • CB750A Hondamatic 1976-1978
  • CB750C 750 Custom 1980-1982
  • CB750F 750 Super Sport 1975-1982
  • CB750K 750 Four 1969-1982
  • CB750SC Nighthawk 750 1982-1983
  • CB900C 900 Custom 1980-1982
  • CB900F 900 Super Sport 1981-1982
  • CBX Super Sport 1979-1980
  • CJ360T 1976-1977
  • CL350K Scrambler 350 1968-1973
  • CL360K Scrambler 360 1974-1975
  • CL450K Scrambler 450 1968-1974
  • CM185T Twinstar 1979
  • CM200T Twinstar 1980
  • CM400A Hondamatic 1979-1981
  • CM400C Custom 1981
  • CM400E Economy 1980-1981
  • CM400T Twin 1979-1981
  • CM450A Hondamatic 1982-1983
  • CM450C Custom 1982
  • CM450E Economy 1982-1983
  • CR125M Elsinore 1974-1975
  • CR250M Elsinore 1973-1977
  • CX500 1978-1979
  • CX500C Custom 1979-1982
  • FT500 Ascot Single 1982-1983
  • GB500 Tourist Trophy 1989-1990
  • GL1000 Gold Wing 1975-1979
  • GL1100 Gold Wing 1980-1983
  • GL1100A Gold Wing Aspencade 1982-1983
  • GL1100I Gold Wing Interstate 1980-1983
  • GL1200 Gold Wing 1984-1987
  • GL1200A Gold Wing Aspencade 1984-1987
  • GL1200I Gold Wing Interstate 1984-1987
  • GL1200L Gold Wing Limited Edition 1985-1986
  • GL1200SE-I Gold Wing Aspencade 1986
  • MR175K Elsinore 1976-1977
  • MR250 Elsinore 1976
  • MT125 Elsinore 1974-1975
  • MT250K Elsinore 1974-1976
  • VF1100C V65 Magna 1983-1986
  • VF500C V30 Magna 1984-1985
  • VF700C V40 Magna 1984-1986
  • VF750C V45 Magna 1982-1983
  • VT1100C Shadow 1100 1985-1986
  • VT500C Shadow 500 1983-1984
  • VT500FT Ascot Twin 1983-1984
  • VT700C Shadow 700 1984-1987
  • VT750C Shadow 750 1983
  • VT750CD Shadow 750 A.C.E. 1998-2003
  • VT800C Shadow 800 1988
  • XL100 1974-1976
  • XL125 1974-1976
  • XL175 1976-1977
  • XL250 1976-1977
  • XL250 Motosport 1972-1975
  • XL350 1974-1977
Kawasaki
  • 454 LTD 1985-1990
  • Eliminator 1000 1987
  • Eliminator 600 1986-1987
  • Eliminator 900 1985-1986
  • F11 1973-1975
  • F5 Big Horn 1970-1971
  • F8 1971-1972
  • F81M 1971
  • F9 Big Horn 1974-1975
  • GPz 550 1981
  • GPz 750 1982
  • H2 Mach IV 1972-1975
  • KD125 1975-1976
  • KE125 1976
  • KH400 1976-1977
  • KH500 1976
  • KS125 1974-1975
  • KX125 1974-1976
  • KX250 2-Stroke 1975-1976
  • KZ1000A 1977-1978
  • KZ1000A MKII 1979-1980
  • KZ1000B 1000 LTD 1977-1980
  • KZ1000D Z1R 1978, 1980
  • KZ1000J 1000 Standard 1981-1983
  • KZ1000K 1000 LTD 1981-1982
  • KZ1000M 1000 CSR 1981-1982
  • KZ1000R Eddie Lawson Replica 1982-1983
  • KZ1100A Shaft 1981-1983
  • KZ1100B 1981-1982
  • KZ1300A Standard 1979-1982
  • KZ1300B Touring 1980
  • KZ250D CSR 1981
  • KZ250L CSR Belt 1982
  • KZ305A CSR 1981-1982
  • KZ305B CSR Belt 1982
  • KZ440A LTD 1980-1983
  • KZ440B Standard 1980-1981
  • KZ550A Standard 1980-1983
  • KZ550C LTD 1980-1983
  • KZ550F Spectre 1983
  • KZ650B 1977-1979
  • KZ650D SR 1978-1979
  • KZ650H CSR 1981-1983
  • KZ750B LTD Twin 1976-1979
  • KZ750E Standard-4 1980-1982
  • KZ750G LTD Twin 1980
  • KZ750H LTD-4 1980-1983
  • KZ900A 1976-1977
  • Voyager 1300 1983-1988
  • Voyager XII 1986-2003
  • Vulcan 1500 1996-1999
  • Vulcan 1500 L 1996-1997
  • Vulcan 700 1985
  • Vulcan 750 1986-2006
  • Vulcan 88 1987-1995
  • Vulcan 88 SE 1987-1990
  • W650 2000-2002
  • Z1 900 Super Four 1973-1975
  • ZN1100B LTD Shaft 1984-1985
  • Zephyr 1100 1992-1995
Suzuki
  • Boulevard S50 2005-2009
  • Boulevard S83 2005-2009
  • GN250 1988
  • GN400T 1980-1982
  • GN400TX 1980-1981
  • GN400X 1980-1981
  • GN400XT 1980-1981
  • GN400XX 1980-1981
  • GS1000 1978-1979
  • GS1000G 1980-1981
  • GS1000S Katana 1982
  • GS1100E 1980-1983
  • GS1100G 1982-1983
  • GS1100GK 1982-1984
  • GS1100S Katana 1983
  • GS250T 1981
  • GS300L 1983
  • GS400 1977-1978
  • GS400X 1977-1978
  • GS425 1979
  • GS450E 1980-1983
  • GS550 1977-1981
  • GS650E 1981
  • GS650G 1981-1983
  • GS650GL 1981-1983
  • GS650M Katana 1983
  • GS750E 1980-1982
  • GS750L 1979-1981
  • GS750S Katana 1983
  • GS850G 1979-1983
  • GT185 Adventurer 1973-1977
  • GT250 Hustler 1973-1977
  • GT380 Sebring 1972-1977
  • GT500 Titan 1976-1977
  • GT550 Indy 1972-1977
  • GV1400GC Cavalcade LXE 1986-1988
  • GV1400GD Cavalcade LX 1986-1988
  • GV1400GT Cavalcade 1986-1988
  • Intruder 1400 1987-2004
  • Intruder 700 1986-1987
  • Intruder 750 1988-1991
  • Intruder 800 1992-2004
  • RE5 Rotary 1974-1976
  • RM100 1976-1977
  • SP370 1978-1979
  • SP400 1980
  • T250 Hustler 1972
  • TC-125 Prospector 1976
  • TM-100 Contender 1974-1975
  • TM-250 Champion 1974-1975
  • TM-400 Cyclone 1971-1975
  • TS-125 Duster 1976
  • VX800 1990-1993
Yamaha
  • AT2 125 1972-1973
  • DT100 1974-1976
  • DT125 1974-1976
  • DT175 1974-1976
  • DT250 1974-1976
  • DT360 1974
  • DT400 1975-1976
  • FZX700 Fazer 1986-1987
  • LT2 1972-1973
  • LT3 1972-1973
  • MX125 1974-1976
  • MX175 1974-1975
  • MX360 1973-1974
  • RD350 1973-1975
  • RD400 1976-1979
  • SR250 Exciter 1980-1982
  • SR500 1977-1981
  • VMX1200 VMAX 1985-1986, 1988-2007
  • XJ1100 Maxim 1982
  • XJ550 Maxim 1981-1983
  • XJ550R Seca 1981-1983
  • XJ650 Maxim 1980-1983
  • XJ650L Midnight Maxim 1981-1983
  • XJ650L Turbo Seca 1982-1983
  • XJ650R Seca 1982
  • XJ700X Maxim X 1985-1986
  • XJ750 Maxim 1982-1983
  • XJ750M Midnight Maxim 1983
  • XJ750R Seca 1981-1983
  • XJ900R Seca 1983
  • XS1100 XS-Eleven 1978-1981
  • XS1100L XS-Eleven Midnight Special 1980-1981
  • XS1100S XS-Eleven Special 1979-1981
  • XS360 1977-1981
  • XS400 Maxim 1980-1981
  • XS400-2 Special II 1978-1979
  • XS400H Heritage Special 1981
  • XS400S Special 1980-1982
  • XS650 1975-1976
  • XS650-2 Special II 1978-1979
  • XS650S Heritage Special 1981-1983
  • XS650S Special 1979-1983
  • XS750S Special 1978-1979
  • XS850 1980-1981
  • XS850L Midnight Special 1980-1981
  • XS850S Special 1980-1981
  • XV1000 Virago 1000 1984-1985
  • XV1100 Virago 1100 1986-1999
  • XV1100S Virago 1100 Special 1996-1998
  • XV535 Virago 535 1987-1988, 1990, 1993-2000
  • XV535S Virago 535 Special 1994-1998
  • XV700 Virago 700 1984-1985
  • XV700C Virago 700 1986-1987
  • XV700S Virago 700 1986
  • XV750 Virago 750 1988-1997
  • YX600 Radian 1986-1990
  • YZ125 1974-1976

Customer Reviews

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Progressive 12 Shock Springs

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Good stuff.


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