Home - Return to Previous Page
Progressive Suspension
Click on image to zoom

Progressive Suspension 444 Series 12in. Shocks - Chrome - 444-4228C

444-4228C

Description

Features the all new Frequency Sensing Technology (FST) which allows the shocks to sense the frequency of a bump and automatically adjust damping for superior ride quality
Deflective disc valving
Adjust spring pre-load by hand, no special tool needed
Includes a progressive rate spring and is high-pressure gas charged for consistent performance
Standard or heavy duty spring rate with a black or chrome finish
Sold in pairs
Made In USA

Product Series

Application List

YearsMakeModelApplicationNotes
1984 - 1985HondaVF500C V30 MagnaHeavy DutyH/D: The heavy duty spring is normally recommended for bikes with additional add-on accessories, rider weight over 200 pounds or passenger use over fifty percent of the time.
1982 - 1983HondaVF750C V45 MagnaHeavy DutyTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. H/D: The heavy duty spring is normally recommended for bikes with additional add-on accessories, rider weight over 200 pounds or passenger use over fifty percent of the time.
1984 - 1986HondaVF700C MagnaHeavy DutyH/D: The heavy duty spring is normally recommended for bikes with additional add-on accessories, rider weight over 200 pounds or passenger use over fifty percent of the time.
1995 - 1996HondaVF750CD Magna DeluxeTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1984 - 1985HondaVT700C ShadowTravel limiters required: .25in. Order Progressive Mfr. #30-5013 STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1994 - 2003HondaVF750C MagnaTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1988 - 1991SuzukiVS750GL IntruderTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1985 - 1986HondaVT1100C ShadowTravel limiters required: .25in. Order Progressive Mfr. #30-5013 TUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1983 - 1983HondaVT750C ShadowTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1988 - 1988HondaVT800C ShadowTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1985 - 1986KawasakiZL900A EliminatorHeavy DutyTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. H/D: The heavy duty spring is normally recommended for bikes with additional add-on accessories, rider weight over 200 pounds or passenger use over fifty percent of the time.
2001 - 2007HondaVT750DC Shadow SpiritChain Drive TUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use. Stock shock length is 12.12in.
1987 - 1987KawasakiZL1000 EliminatorHeavy DutyTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. H/D: The heavy duty spring is normally recommended for bikes with additional add-on accessories, rider weight over 200 pounds or passenger use over fifty percent of the time.
1986 - 1987HondaVT700C ShadowTravel limiters required: .50in. Order Progressive Mfr. #30-5014 STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1984 - 1985YamahaXV1000 ViragoTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use. Approximate stock shock length is 11.75in.
1998 - 2003HondaVT750C/CD Shadow ACETUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
2005 - 2008SuzukiS83 BoulevardTravel limiters required: .25in. Order Progressive Mfr. #30-5013 TUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1996 - 1997KawasakiVN1500C Vulcan LTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1985 - 1987SuzukiVS700 IntruderTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1996 - 1999KawasakiVN1500A Vulcan 1500TUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1987 - 2004SuzukiVS1400GL IntruderTravel limiters required: .25in. Order Progressive Mfr. #30-5013 TUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1987 - 1990KawasakiVN1500B Vulcan 88 SETUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1986 - 1999YamahaXV1100 ViragoTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use. Approximate stock shock length is 11.75in.
2005 - 2009SuzukiS50 BoulevardTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1987 - 2000YamahaXV535 ViragoHeavy DutyTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. H/D: The heavy duty spring is normally recommended for bikes with additional add-on accessories, rider weight over 200 pounds or passenger use over fifty percent of the time. Approximate stock shock length is 11.75in.
1986 - 1987KawasakiZL600 EliminatorHeavy DutyTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. H/D: The heavy duty spring is normally recommended for bikes with additional add-on accessories, rider weight over 200 pounds or passenger use over fifty percent of the time.
1988 - 1997YamahaXV750 ViragoTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use. Approximate stock shock length is 11.75in.
1985 - 1985KawasakiVN700A VulcanHeavy DutyTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. H/D: The heavy duty spring is normally recommended for bikes with additional add-on accessories, rider weight over 200 pounds or passenger use over fifty percent of the time.
1986 - 2006KawasakiVN750A Vulcan 750Heavy DutyTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. H/D: The heavy duty spring is normally recommended for bikes with additional add-on accessories, rider weight over 200 pounds or passenger use over fifty percent of the time.
1992 - 2004SuzukiVS800GL IntruderTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1985 - 2007YamahaVMX1200 V-MaxTUV - Some or all shocks listed have TUV approval. Refer to the most recent TUV certificate for current listing. STD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use.
1984 - 1987YamahaXV700 ViragoSTD: The standard spring is recommended for the bike as sold new, excluding any bolt-on accessories, rider weight under 200 pounds and limited passenger use. Approximate stock shock length is 11.75in.

Shipping Information

  • Item Requires Shipping
  • 5.0 lbs.
  • W6.0000” x H10.0000” x L4.0000”
  • Free Ground Shipping (1 - 5 Days)