Progressive 412 Shocks For Harley Dyna 1991-2017
🏍️ Best Value Upgrade: Progressive 412 Shocks for Harley Dyna (1991–2017)
The Progressive Suspension 412 Series Shocks are one of the most popular and cost-effective upgrades for the dual-shock Harley-Davidson Dyna platform, spanning from the early EVO-powered bikes (1991) through the final Twin Cam models (2017).
The 412s offer a significant improvement over stock suspension performance, ride quality, and aesthetics at a budget-friendly price point, and they are available in multiple lengths to customize your bike’s stance.
🔑 Key Features of the 412 Series
Durable Design: Features a double-wall steel body construction with nitrogen gas charging for consistent damping performance.
Damping: Uses multi-staged, velocity-sensitive valving to provide smoother and more consistent damping compared to the basic stock units.
Adjustable Preload: Equipped with a 5-position cam-style preload adjuster (spanner wrench included) to easily dial in stiffness based on rider weight, passenger, and load.
Spring Rate: Available with Progressive Rate Springs in two main options:
Standard Duty: For most average-weight riders (typically under 250 lbs total loaded weight).
Heavy Duty: Recommended for bikes operated at or near the manufacturer’s maximum load rating over 50% of the time (e.g., frequent two-up riding or heavier riders/baggers).
Finishes: Available in a variety of finishes, including Chrome or Black bodies and springs, often with optional full-length chrome covers.
🏍️ Best Value Upgrade: Progressive 412 Shocks for Harley Dyna (1991–2017)
The Progressive Suspension 412 Series Shocks are one of the most popular and cost-effective upgrades for the dual-shock Harley-Davidson Dyna platform, spanning from the early EVO-powered bikes (1991) through the final Twin Cam models (2017).
The 412s offer a significant improvement over stock suspension performance, ride quality, and aesthetics at a budget-friendly price point, and they are available in multiple lengths to customize your bike’s stance.
🔑 Key Features of the 412 Series
Durable Design: Features a double-wall steel body construction with nitrogen gas charging for consistent damping performance.
Damping: Uses multi-staged, velocity-sensitive valving to provide smoother and more consistent damping compared to the basic stock units.
Adjustable Preload: Equipped with a 5-position cam-style preload adjuster (spanner wrench included) to easily dial in stiffness based on rider weight, passenger, and load.
Spring Rate: Available with Progressive Rate Springs in two main options:
Standard Duty: For most average-weight riders (typically under 250 lbs total loaded weight).
Heavy Duty: Recommended for bikes operated at or near the manufacturer’s maximum load rating over 50% of the time (e.g., frequent two-up riding or heavier riders/baggers).
Finishes: Available in a variety of finishes, including Chrome or Black bodies and springs, often with optional full-length chrome covers.
Length Options and Ride Height
The Dyna platform came with different stock shock lengths depending on the model and year (most were between 12″ and 13.5″). The 412 Series allows you to maintain stock height, raise it, or lower it:
412 Length Option Drop vs. Typical Stock Ride Impact
13.5″ or 13″ Stock or Slightly Raised Maximum travel, best lean angle, improved comfort.
12.5″ Common Stock Length Neutral handling, a good balance of comfort and stance.
12.0″ 0.5″ to 1.5″ Drop Popular lowered look, slight reduction in lean angle.
11.5″ or 11.0″ 1.0″ to 2.5″ Drop Slammed look, noticeable loss of travel, reduced lean angle.
Note on 11″ Shocks: If choosing a very short length (11″ or 11.5″), confirm that the wheel travel can be altered without causing clearance issues, such as tire-to-fender or swingarm-to-exhaust contact.
Fitment Range (1991–2017)
The Progressive 412 Series is a direct bolt-on replacement for most Harley Dyna models in this range, including:
FXD Super Glide / Custom
FXDL Low Rider / S
FXDB Street Bob
FXDF Fat Bob
FXDWG Wide Glide
Note: Excludes Switchback (FLD) models due to their unique suspension setup.
The Progressive 412 Shocks are widely regarded as the best “bang-for-the-buck” performance upgrade for the Dyna, offering a noticeable improvement in ride quality and handling over the tired factory shocks.
Progressive 412 Shocks For Harley Dyna
The 412 Series shocks are simply the best value shock on the market. The have a simple, durable design which means they will be an improvement to your motorcycle’s suspension performance for as long as you are riding. They feature a doublewall steel body construction with nitrogen charged, multi-staged velocity sensitive valving resulting in smooth, consistent damping. A cam style preload adjuster lets you dial in your ride whether you’re a light or heavy rider.
Features:
5-position cam style preload adjuster
High Pressure Gas Charged for consistent damping performance
Standard or Heavy-Duty progressive rate springs
Available with chrome or black full cover
Backed by a one-year limited warranty
Made in the USA
| Product Style | AmericanV-twin Item # | Catalog Number | Store Sku | MFR. Product # | Availability |
|---|---|---|---|---|---|
| Standard 11″ / Black | 899873 | 701-739 | 299428 | 412-4037B | In Stock: Ships within 24 hours |
| Standard 11″ / Chrome With Covers | 899874 | 701-483 | 412-4041C | In Stock: Ships within 24 hours | |
| Standard 11″ / Chrome | 899889 | 701-219 | 412-4037C | In Stock: Ships within 24 hours | |
| Standard 12″ / Black With Covers | 899733 | 137-662 | 412-4042B | In Stock: Ships within 24 hours | |
| Standard 12″ / Chrome With Covers | 899881 | 701-484 | 412-4042C | In Stock: Ships within 24 hours | |
| Standard 12″ / Black | 899885 | 701-741 | 412-4036B | In Stock: Ships within 24 hours | |
| Standard 12″ / Chrome | 899888 | 701-607 | 412-4036C | In Stock: Ships within 24 hours | |
| Standard 12 1/2″ / Black | 899721 | 701-743 | 412-4038B | In Stock: Ships within 24 hours | |
| Standard 12 1/2″ / Chrome | 899882 | 701-330 | 412-4038C | In Stock: Ships within 24 hours | |
| Standard 13 1/2″ / Black | 1649452 | 350-3502 | 299441 | 412-4083B | In Stock: Ships within 24 hours |
| Black / Standard 14″ | 1649450 | 350-3504 | 412-4085B | In Stock: Ships within 24 hours | |
| Black / Heavy Duty 11″ | 899883 | 701-740 | 299427 | 412-4045B | In Stock: Ships within 24 hours |
| Heavy Duty 11″ / Chrome | 899919 | 701-838 | 299429 | 412-4045C | In Stock: Ships within 24 hours |
| Heavy Duty 11″ / Chrome With Covers | 899921 | 701-754 | 412-4047C | In Stock: Ships within 24 hours | |
| Black With Covers / Heavy Duty 12″ | 899734 | 690-195 | 412-4046B | In Stock: Ships within 24 hours | |
| Black / Heavy Duty 12″ | 899891 | 701-742 | 320197 | 412-4044B | In Stock: Ships within 24 hours |
| Heavy Duty 12″ / Chrome | 899918 | 701-738 | 412-4044C | In Stock: Ships within 24 hours | |
| Heavy Duty 12″ / Chrome With Covers | 899920 | 701-755 | 412-4046C | In Stock: Ships within 24 hours | |
| Black / Heavy Duty 12 1/2″ | 899922 | 701-840 | 412-4048B | In Stock: Ships within 24 hours | |
| Heavy Duty 12 1/2″ / Chrome | 899923 | 701-839 | 412-4048C | Only 2 Left: Ships within 24 hours | |
| Black / Heavy Duty 13 1/2″ | 1649449 | 350-3503 | 412-4084B | In Stock: Ships within 24 hours | |
| Black / Heavy Duty 14″ | 1649451 | 350-3505 | 412-4086B | In Stock: Ships within 24 hours |
This Product Fits
Harley Davidson
Dyna Convertible FXDS 1994-2000
Dyna Fat Bob FXDF 2008-2017
Dyna Glide Custom FXDC 1992
Dyna Glide Daytona FXDB-D 1992
Dyna Glide Sturgis FXDB-S 1991
Dyna Low Rider FXDL/I 1993-2017
Dyna Low Rider S FXDLS 2016, 2017
Dyna Street Bob FXDB/I 2006-2017
Dyna Super Glide Custom FXDC/I 2005-2014
Dyna Super Glide FXD/I 1995-2010
Dyna Wide Glide FXDWG/I 1993-2017
