Features the all new Frequency Sensing Technology (FST)

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  • 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 the U.S.A.
Progressive Suspensions 444 Series FST

NOTE: A shock which is slightly longer than stock may alter the head angle slightly and provide somewhat quicker steering.

NOTE: A shock which is slightly shorter than stock may slightly alter the head angle and provide somewhat slower steering.

NOTE: For OEM shock lengths, see the Quick Reference Guide in the back of the FatBook.

NOTE: Heavy Duty Applications are recommended for bikes operating at or near the manufacturer's maximum load rating over 50% of the time.

NOTE: Before purchasing or attempting to install shocks that are different than the OEM length, confirm that your wheel travel can be altered without causing clearance issues such as, swingarm/axle to exhaust contact as well as chain/belt guard or tire contact.

1310-0780   12" BLACK 444-4044B
1310-0781   12" CHROME 444-4044C
1310-0782   12.5" BLACK 444-4048B
1310-0783   12.5" CHROME 444-4048C
1310-0788   13" BLACK 444-4051B
1310-0789   13" CHROME 444-4051C


1994 - 2000Harley-DavidsonDyna Convertible - FXDS-CONV 
1992Harley-DavidsonDyna Daytona - FXDB 
2008 - 2015Harley-DavidsonDyna Fat Bob (EFI) - FXDF 
1992Harley-DavidsonDyna Glide Custom - FXDC 
2007 - 2009Harley-DavidsonDyna Low Rider (EFI) - FXDL 
2014 - 2015Harley-DavidsonDyna Low Rider (EFI) -FXDL 
1993 - 2005Harley-DavidsonDyna Low Rider - FXDL 
2004 - 2006Harley-DavidsonDyna Low Rider-Injected - FXDL-I 
2007 - 2015Harley-DavidsonDyna Street Bob (EFI) - FXDB 
2006Harley-DavidsonDyna Street Bob - FXDB-I 
1991Harley-DavidsonDyna Sturgis - FXDB 
2007 - 2010Harley-DavidsonDyna Super Glide (EFI) - FXD 
1995 - 2005Harley-DavidsonDyna Super Glide - FXD 
2007 - 2014Harley-DavidsonDyna Super Glide Custom (EFI) - FXDC 
2005 - 2006Harley-DavidsonDyna Super Glide Custom Injected - FXDC I 
2004 - 2006Harley-DavidsonDyna Super Glide Injected - FXD I 
1999 - 2005Harley-DavidsonDyna Super Glide Sport - FXDX 
2004 - 2005Harley-DavidsonDyna Super Glide Sport Injected - FXDX I 
2001 - 2003Harley-DavidsonDyna Super Glide T-Sport - FXDXT 
2007 - 2008Harley-DavidsonDyna Wide Glide (EFI) - FXDWG 
2010 - 2015Harley-DavidsonDyna Wide Glide (EFI) - FXDWG 
1993 - 2005Harley-DavidsonDyna Wide Glide - FXDWG 
2004 - 2006Harley-DavidsonDyna Wide Glide-Injected - FXDWG-I 
2006Harley-DavidsonSuper Glide Injected - FXD35-I 

  • Product Name:444 SERIES DYNA HEAVY DUTY
  • Product Reference: 1310-0780
  • By Progressive Suspension
  • Price: US$
  • Product Width: 0.00 in
  • Product Height: 0.00 in
  • Product Depth: 0.00 in
  • Product Weight: 8.70 lbs
  • Description: Features the all new Frequency Sensing Technology (FST)

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