The Progressive Suspension Drop-In Fork Lowering Kit is one of the most popular and versatile components for customizing the stance of a wide range of Harley-Davidson motorcycles. This kit is designed for easy installation across multiple platforms—including Sportster, Dyna, and Softail—that use common fork tube diameters throughout the long period from 1984 through 2017.

The key benefit is achieving a custom lowered look (up to 2 inches) without the full, complex fork disassembly required by traditional lowering methods.
Drop-In Technology: Simple & Effective

The “Drop-In” feature makes this kit highly accessible for home mechanics by minimizing the tools and time required for installation.

Lowering Range: Typically allows for lowering the front end by 1 inch or 2 inches, adjustable by trimming the provided spacers.

No Full Disassembly: The kit is designed to be installed without removing the fork legs from the triple trees or draining the fork fluid, a massive time-saver compared to replacing the internal damping rods.

Progressive Rate Springs: The kit includes specially engineered springs with a Progressive Rate (softer initial compression, stiffer final compression) to resist harsh bottoming on the reduced travel. Versatile Drop: Progressive Drop-In Fork Lowering Kit for Harley (1984–2017)

The Progressive Suspension Drop-In Fork Lowering Kit is one of the most popular and versatile components for customizing the stance of a wide range of Harley-Davidson motorcycles. This kit is designed for easy installation across multiple platforms—including Sportster, Dyna, and Softail—that use common fork tube diameters throughout the long period from 1984 through 2017.

The key benefit is achieving a custom lowered look (up to 2 inches) without the full, complex fork disassembly required by traditional lowering methods.
Drop-In Technology: Simple & Effective

The “Drop-In” feature makes this kit highly accessible for home mechanics by minimizing the tools and time required for installation.

Lowering Range: Typically allows for lowering the front end by 1 inch or 2 inches, adjustable by trimming the provided spacers.

No Full Disassembly: The kit is designed to be installed without removing the fork legs from the triple trees or draining the fork fluid, a massive time-saver compared to replacing the internal damping rods.

Progressive Rate Springs: The kit includes specially engineered springs with a Progressive Rate (softer initial compression, stiffer final compression) to resist harsh bottoming on the reduced travel.

Broad Fitment and Kit Variations

Because Harley-Davidson used three primary fork diameters for their custom lines during this era, Progressive offers different kit part numbers based on the fork size:
Fork Diameter Harley Platform (Example) Model Years (Approx.) Progressive Part # (Example)
39mm Sportster (XL), Dyna (FXD – excl. 49mm models) 1987–2005 (or later XL) 10-2001
41mm Softail (FXST, FLST), FXR, Older Touring (FLH) 1984–2017 (Softail/FXR) 10-2000
49mm Dyna (FXD), Newer Softail (FXST) 2006–2017 10-2002

Crucial Note: It is absolutely essential to verify your specific bike’s fork tube diameter (39mm, 41mm, or 49mm) before ordering, as the contents of the kit vary significantly by size.

Key Considerations

Cornering Clearance: Lowering the bike will reduce ground clearance, potentially limiting available lean angle.

Jiffy Stand: A 2-inch drop may require a shorter jiffy stand to ensure safe parking.

The Progressive Drop-In Fork Lowering Kit Harley offers a simple, cost-effective way to customize your bike’s profile across decades of models.

Progressive Drop-In Fork Lowering Kit For Harley
Features:

This fork Lowering Kit has transformed a once messy, and time consuming install into an easy install
Pull up to two inches out of the front end of your bike without the hassle of disassembling the forks, pulling the wheel or even changing out the oil and the whole process can be done with basic tools
Shorter springs and Progressive’s secondary compensator spring make short work of the formerly complicated act of lowering your front end

Note: Requires fork tubes to be removed from top triple tree.
Made in the USA

Fitment Notes & Exceptions

Fits non-cartridge style front ends only
Will not fit 2002-2005 FLHT or FLT models
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
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 Wide Glide FXDWG/I 1993-2005
Electra Glide Classic FLHTC/I 1984-2013
Electra Glide Standard FLHT/I 1984-2009
Electra Glide Ultra Classic FLHTCU/I 1989-2013
Electra Glide Ultra Limited FLHTK 2010, 2011, 2012, 2013
Road Glide Custom FLTRX 2010, 2011, 2012, 2013
Road Glide FLTR/I 1998-2009
Road Glide Ultra FLTRU 2011, 2012, 2013
Road King Classic FLHRC/I 1998-2013
Road King Custom FLHRS/I 2004, 2005, 2006, 2007
Road King FLHR/I 1994-2013
Softail Custom FXSTC/I 1986-2010
Softail Deluxe FLSTN/I 2005-2017
Softail Deuce FXSTD/I 1999-2007
Softail Fat Boy FLSTF/I 1990-2017
Softail Fat Boy Lo FLSTFB 2010-2016
Softail Fat Boy S FLSTFBS 2016, 2017
Softail Heritage Classic FLSTC/I 1987-2017
Softail Heritage FLST/I 1986-2006
Softail Night Train FXSTB/I 1999-2009
Softail Nostalgia FLSTN/I 1993
Softail Slim FLS 2012-2017
Softail Slim S FLSS 2016, 2017
Softail Special FLSTN/I 1994, 1995, 1996
Softail Standard FXST/I 1984-2012
Street Glide FLHX/I 2006-2013
Tour Glide Classic FLTC/I 1984-1991
Tour Glide FLT 1984, 1985, 1986
Tour Glide Ultra Classic FLTCU/I 1989-1996