DK Custom Products

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Front Suspension - Progressive Fork Spring Kit Harley-Davidson

Availability: In stock
Manufacturer: Progressive Suspension

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DK Custom Front Suspension - Progressive Fork Spring Kit Harley-Davidson More Comfortable Ride suspension

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Sportster ~ Dyna ~ Softail ~ Touring ~ Trike



Features & Specs:

  • Progressive Rate Spring
  • High Quality Chrome Silicone Wire
  • Precision Wound
  • Plush Ride
  • Improved Lean Angle
  • Includes Spacers for Sag Adjustment
  • Lifetime Warranty
  • Straight-Forward Install-Comes with Instructions


DK Custom Products has tested numerous aftermarket suspension components.  We've logged well over 16,000 miles on a variety of bikes and trikes, covering an array of road condtions, loads and speeds.   All this, while paying close attention to the ride quality with various suspension configurations.

You can view our full report on our testing of various suspension components at this LINK.


 When you order you will be asked a few easy questions.  Your answers give us the information needed to send you the correct springs for your bike/weight/riding preferences.


These Progressive Rate Fork Springs soak up the small road bumps, yet are firm enough to absorb the big ones.

Spring rates have been chosen to reduce front end "dive" during braking, yet still provide excellent ride comfort.

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. 


1983-Up Sportster Models

1993-Up Dyna Models

1984-Up Softail Models

2002-Up Touring Models

2009-Up Trike Models

All Trikes & 2014-Up Touring Models are an extra $12.95 (if you have one of these models, please check the box when ordering)


It is not necessary to change the fork fluid when installing these springs.  However, it will improve the ride quality.   We recommend Maxima Racing Formula Fork Fluid. 

Fork fluid is something you can get locally, or use the option to add it to your order.

Sportsters- 2 liters of 10 Weight

Dyna, Softail, Touring & Trikes- 2 liters of 15 weight

Important Note: If you are ordering fork fluid AND you add the Intiminators to your order, the special valving in them requires a specific weight of Fork Fluid for them to work properly.  We will send either 5 weight or 10 weight, whichever is correct for your specific bike.


All suspension that is upgraded with springs will ride even better with the addition of the Intiminator Fork Valve System.  You can read more on them HERE.  You can see our grading of springs & other suspension components HERE.


Save $ with a Special Package

See Stage I, II, & III Total Suspension Upgrades HERE.


*Special package pricing is available only when purchased via the Stage I, II or III upgrades at the above link.  Applying the savings After ordering the components individually actually costs us more $, so no additional savings are available after the fact. 



" I like the feel of the Progressive Springs much better than the stock springs.  I also like them better than the straight rate springs, that are a little stiffer.  The plush ride is worth it for giving up a little bit of the road feel.

Coupled with the Intiminator Fork Valves, they are the best value for the $ on my Sportster & Softail!"-Kevin

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