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Progressive Heavy Duty Fork Springs For Harley Dyna, FXR, and Sportster 1988-2016

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Progressive Suspension Heavy Duty Fork Springs For Harley Dyna, FXR, and Sportster

The heavy-duty progressive-rate fork springs soak up small road bumps, yet are firm enough to absorb the ones that shake the kidneys. Spring rates have been chosen to reduce front end dive during braking, yet still provide excellent ride comfort, and also balance the weight of a bike laden with greater-than-average loads. A progressive-rate spring has the advantage of a resistance to compression that rises as the spring is being compressed - it gets tougher to compress as it is compressed. The benefit of this is that the spring can be soft enough at the start of the travel to offer a plush ride, yet be firm enough at the end of the travel to soak up the big bumps.


  • Progressive spring rate
  • High-quality chrome-silicon wire
  • Precision wound
  • Made in USA

Fitment Notes & Exceptions

  • Changing ride height can potentially change many carefully-engineered attributes of your bike, including trail and mechanical trail
  • A change in ride height at one end of the vehicle usually will require a change at the other end
  • Heavy Duty shocks are recommended for bikes operated at or near the OEM maximum load rating over 50% of the time
  • Prior to purchasing springs that are different than your OEM length, please verify that wheel and suspension travel can be altered without causing clearance issues - common interference spots include triple trees, fenders, frame, and of course, the ground.
This Product Fits:
Harley Davidson
Dyna Glide Daytona FXDB-D 1992
Dyna Glide Sturgis FXDB-S 1991
Sport Glide FXRT 1988, 1989, 1990, 1991, 1992
Sportster Custom XL1200C 20042016
Sportster Custom XL883C 20042009
Sportster Forty-Eight XL1200X 20102015
Sportster Iron XL883N 20092016
Sportster Low/SuperLow XL883L 20052016
Sportster Low XL1200L 20042011
Sportster Nightster XL1200N 20072012
Sportster Roadster XL1200R 2004, 2005, 2006, 2007, 2008
Sportster Roadster XL883R 20042012
Sportster Seventy-Two XL1200V 2012, 2013, 2014, 2015, 2016
Sportster SuperLow XL1200T 2014, 2015, 2016
Sportster XL883 20042009
Street 500 XG500 2015, 2016
Street 750 XG750 2015, 2016
Product Style RevZilla Item # Manufacturer Product # Availability
39mm Tubes, Stock Length 903006 111552 In Stock: Ships within 24 hours


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Progressive Heavy Duty Fork Springs For Harley Dyna, FXR, and Sportster 1988-2016
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