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Progressive Suspension Monotube Fork Cartridge Kit For Harley Sportster
True high-performance front suspension has finally made its way to HD. Progressive's state-of-the-art Monotube Fork Kit represents the pinnacle of front end handling. High performance specialty components replace the sloppy open bath damping found in HD forks. The kit features a set of gas charged monotube dampers and a set of custom tuned fork springs so you can convert your bike to cartridge forks whether you have dual damper rod forks or a damper rod/cartridge setup.
- Complete fork internal replacement kit
- Improved resistance to front brake dive, front end stability & cornering traits, and better avoidance of "bottoming out"
- Made in USA
- Progressive spring rate
- High-quality chrome-silicon wire
- Precision wound
Note: Does not include Allen key.
|Product Style||RevZilla Item #||MFR. Product #||Availability|
|Product Style 2" Drop Kit||RevZilla Item #903034||MFR. Product #31-2518||AvailabilityIn Stock: Ships within 24 hours|
|Product Style Stock Height Kit||RevZilla Item #903017||MFR. Product #31-2515||AvailabilityIn Stock: Ships within 24 hours|
- Harley Davidson
- Sportster Forty-Eight XL1200X 2010-2015
- Sportster Iron XL883N 2009-2015
- Sportster Low/SuperLow XL883L 2007, 2008, 2009, 2010
- Sportster Nightster XL1200N 2007-2012
- Harley Davidson
- Electra Glide Classic FLHTC/I 1984-1996
- Electra Glide Classic FLHTC/I 1997-2013
- Electra Glide CVO/SE FLHTCSE 2004
- Electra Glide CVO/SE FLHTCSE2 2005
- Electra Glide Special FLHX 1984
- Electra Glide Sport FLHS 1984-1993
- Electra Glide Standard FLHT/I 1984-1996
- Electra Glide Standard FLHT/I 1997-2009
- Electra Glide Ultra Classic FLHTCU/I 1987-1996
- Electra Glide Ultra Classic FLHTCU/I 1997-2013
- Electra Glide Ultra Classic FLHTCU/I 2014-2016
- Electra Glide Ultra Classic FLHTCU/I 2017-2018
- Electra Glide Ultra Classic Low FLHTCUL 2015-2016
- Electra Glide Ultra Limited FLHTK 2010-2013
- Electra Glide Ultra Limited FLHTK 2014-2016
- Electra Glide Ultra Limited FLHTK 2017-2018
- Electra Glide Ultra Limited Low FLHTKL 2015-2016
- FLH 1984-1985
- Freewheeler FLRT 2015-2016
- Road Glide Custom FLTRX 2010-2013
- Road Glide CVO/SE FLTRSE3 2009
- Road Glide CVO/SE FLTRSEI 2009
- Road Glide CVO/SE FLTRSEI2 2001
- Road Glide CVO/SE FLTRXSE 2012-2013
- Road Glide FLTR/I 1998-2009
- Road Glide FLTRX 2015-2016
- Road Glide FLTRX 2017-2018
- Road Glide Special FLTRXS 2015-2016
- Road Glide Special FLTRXS 2017-2018
- Road Glide Ultra CVO/SE FLTRUSE 2011
- Road Glide Ultra FLTRU 2011-2013
- Road Glide Ultra FLTRU 2016
- Road Glide Ultra FLTRU 2017-2018
- Road King Classic FLHRC/I 1994-1996
- Road King Classic FLHRC/I 1997-2013
- Road King Custom FLHRS/I 1995-1996
- Road King Custom FLHRS/I 1997-2012
- Road King CVO/SE FLHRSE3 2007
- Road King CVO/SE FLHRSE4 2008
- Road King CVO/SE FLHRSEI 2002
- Road King CVO/SE FLHRSEI2 2003
- Road King FLHR/I 1994-1996
- Road King FLHR/I 1997-2013
- Road King FLHR/I 2014-2016
- Road King FLHR/I 2017-2018
- Road King Special FLHRXS 2017-2018
- Softail Convertible CVO/SE FLSTSE 2010
- Softail Convertible CVO/SE FLSTSE2 2011
- Softail Convertible CVO/SE FLSTSE3 2012
- Softail Custom FXSTC/I 2007-2010
- Softail Custom/Nostalgia/Special/Deluxe FLSTN/I 2005-2017
- Softail Deuce CVO/SE FXSTDSE 2003
- Softail Deuce CVO/SE FXSTDSE2 2004
- Softail Deuce FXSTD/I 2000-2007
- Softail Fat Boy CVO/SE FLSTFSE 2005
- Softail Fat Boy CVO/SE FLSTFSE2 2006
- Softail Fat Boy FLSTF/I 2000-2017
- Softail Fat Boy Lo FLSTFB 2009-2016
- Softail Fat Boy S FLSTFBS 2016-2017
- Softail Heritage Classic FLSTC/I 2000-2017
- Softail Heritage FLST/I 2006
- Softail Night Train FXSTB/I 2000-2009
- Softail Slim FLS 2012-2017
- Softail Slim S FLSS 2016-2017
- Softail Standard FXST/I 2000-2010
- Sportster Custom XL1200C 2004-2010
- Sportster Custom XL1200C 2012-2015
- Sportster Custom XL1200C 2016-2018
- Sportster Custom XL883C 2004-2009
- Sportster Forty-Eight Special XL1200XS 2018
- Sportster Forty-Eight XL1200X 2016-2018
- Sportster Iron XL1200NS 2018
- Sportster Iron XL883N 2016-2018
- Sportster Low/SuperLow XL883L 2005-2015
- Sportster Low/SuperLow XL883L 2016-2018
- Sportster Low XL1200L 2007-2011
- Sportster Roadster XL1200R 2004-2008
- Sportster Roadster XL883R 2006-2012
- Sportster Seventy-Two XL1200V 2016
- Sportster SuperLow XL1200T 2014-2017
- Sportster XL883 2004-2009
- Street Glide CVO/SE FLHXSE 2010
- Street Glide CVO/SE FLHXSE2 2011
- Street Glide CVO/SE FLHXSE3 2012
- Street Glide FLHX/I 2006-2013
- Street Glide FLHX/I 2014-2016
- Street Glide FLHX/I 2017-2018
- Street Glide Special FLHXS 2014-2016
- Street Glide Special FLHXS 2017-2018
- Street Glide Trike FLHXXX 2010-2011
- Tour Glide Classic FLTC/I 1984-1991
- Tour Glide FLT 1984-1991
- Tour Glide Ultra Classic FLTCU/I 1989-1995
- Tri Glide Ultra Classic FLHTCUTG 2009-2013
- Tri Glide Ultra Classic FLHTCUTG 2014-2016
- Ultra Classic Electra Glide CVO/SE FLHTCUSE 2006
- Ultra Classic Electra Glide CVO/SE FLHTCUSE2 2007
- Ultra Classic Electra Glide CVO/SE FLHTCUSE3 2008
- Ultra Classic Electra Glide CVO/SE FLHTCUSE4 2009
- Ultra Classic Electra Glide CVO/SE FLHTCUSE5 2010
- Ultra Classic Electra Glide CVO/SE FLHTCUSE6 2011
- Ultra Classic Electra Glide CVO/SE FLHTCUSE7 2012
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Reviews & Questions
Stock suspension is horrible on these bikes from the factory. I did the 412's in the rear at 13" and immediatley the front suspension weakness showed even more. I decided to spend the extra coin on the cartridge kit and I'm SOOOO glad I did.
I was having alot of wheel drift problems on the highway and other issues with the front end handling. This kit fixed EVERYTHING. The bike is so planted now on the road, world of a difference. Buy the kit and don't look back!
Best of all, no need to remove the forks to install on a sporty!
1 year ago
Miles ridden with monotube kit: ~800 miles
Rear suspension: Progressive Suspension 13" 412 series
With my weight and rear suspension the recommended 6 pre-load spacers gave me 1/8 inch of static sag!! 5 spacers gave me 1/2 inch of static sag. 4 spacer gave me 3/4 inch static sag. So after taking apart my front fork tubes 3 times I finally got the static sag that I'm happy with.
I can feel the monotube kit working over bumps, and is real nice vs stock.
-pre-load is adjustable
-improvement over stock
-improvement over drop in springs?
-no more fork oil changes or leaks
-recommended pre-load is for heavy riders
-must take off the fork tubes to adjust pre-load
-fork tube cap is part of the damper tube assembly, so will not work with a separate pre-load fork cap for fine tuning
overall I'm very happy about this upgrade and would do it again. Also let me get real good at taking apart the front tire, brakes, and fork tubes.
over 2 years ago
If you are looking for max performance use standard length as it gives more travel then the dropped one - more travel give you better control in corners and the longer travel reduce the braking distance -
The drop 2 inch will give you the "look" and compared with Harley stock shock you will get a significant performance gain.
In general this Kit improves the bike dramatic - cornering, control during braking -- a real upgrade and the bike rides fare better then stock.