Progressive 444 Series Motorcycle Heavy Duty Chrome 13" Rear Shocks (444-4020C)
- Feature 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 preload by hand, no special tool needed
- Include a progressive rate spring and is high-pressure gas charged for consistent performance
- Sold in pairs
- Made in the U.S.A.
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: 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.
| Compatible Vehicles | |||
| Years | Make | Model | Notes |
| 2006 | Harley-Davidson | Electra Glide Classic EFI FLHTCI | |
| 2007-2013 | Harley-Davidson | Electra Glide Classic FLHTC | |
| 2006 | Harley-Davidson | Electra Glide EFI FLHTI | |
| 2006-2009 | Harley-Davidson | Electra Glide FLHT | |
| 2015-2016 | Harley-Davidson | Electra Glide Low Ultra Classic FLHTCUL | |
| 2015 | Harley-Davidson | Electra Glide Low Ultra Limited FLHTKL | |
| 2019-2022 | Harley-Davidson | Electra Glide Standard FLHT | |
| 2006 | Harley-Davidson | Electra Glide Ultra Classic EFI FLHTCUI | |
| 2007-2019 | Harley-Davidson | Electra Glide Ultra Classic FLHTCU | |
| 2010-2015 | Harley-Davidson | Electra Glide Ultra Limited FLHTK | |
| 2023 | Harley-Davidson | Road Glide 3 FLTRT | |
| 2010-2013 | Harley-Davidson | Road Glide Custom FLTRX | |
| 2006 | Harley-Davidson | Road Glide EFI FLTRI | |
| 2007-2009 | Harley-Davidson | Road Glide FLTR | |
| 2015-2023 | Harley-Davidson | Road Glide FLTRX | |
| 2020-2023 | Harley-Davidson | Road Glide Limited FLTRK | |
| 2015-2023 | Harley-Davidson | Road Glide Special FLTRXS | |
| 2022-2023 | Harley-Davidson | Road Glide ST FLTRXST | |
| 2011-2013 | Harley-Davidson | Road Glide Ultra FLTRU | |
| 2016-2019 | Harley-Davidson | Road Glide Ultra FLTRU | |
| 2006 | Harley-Davidson | Road King Classic EFI FLHRCI | |
| 2007-2013 | Harley-Davidson | Road King Classic FLHRC | |
| 2006 | Harley-Davidson | Road King Custom EFI FLHRSI | |
| 2006-2007 | Harley-Davidson | Road King Custom FLHRS | |
| 2006 | Harley-Davidson | Road King EFI FLHRI | |
| 2006-2022 | Harley-Davidson | Road King FLHR | |
| 2017-2023 | Harley-Davidson | Road King Special FLHRXS | |
| 2006 | Harley-Davidson | Street Glide EFI FLHXI | |
| 2006-2023 | Harley-Davidson | Street Glide FLHX | |
| 2014-2023 | Harley-Davidson | Street Glide Special FLHXS | |
| 2022-2023 | Harley-Davidson | Street Glide ST FLHXST | |
| 2016-2023 | Harley-Davidson | Ultra Limited FLHTK | |
| 2016-2019 | Harley-Davidson | Ultra Limited Low FLHTKL | |