Progressive 412 Series shocks deliver suspension tuning at an accessible price point with a doublewall steel body, nitrogen-charged damping, and a five-position preload adjuster to match any rider weight. Engineered for smooth, consistent performance across Harley-Davidson applications.
Features
- Doublewall steel construction
- Nitrogen-charged, multi-stage velocity-sensitive damping
- 5-position cam-style preload adjuster
- Progressive-rate springs available in standard or heavy-duty
- Chrome or black finish options
- Show Chrome covers available on select models
Specifications
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Brand: Progressive
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Manufacturer Part #: 412-4003B
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Weight: 10 lb
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Category: Suspension / Shocks and Struts
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California Prop 65 Warning: Yes — contains materials known to cause cancer and reproductive harm
Fitment
Fits Harley-Davidson models. Verify your specific year and model compatibility before ordering, as suspension fitment varies by chassis generation.
Frequently Asked Questions
Can I adjust the preload on the fly?
Yes — the 5-position cam-style preload adjuster lets you tune ride height and stiffness without tools. Rotate the cam to match your weight and load.
Do these come with Show Chrome covers?
Show Chrome covers are optional on select applications. Check the product listing for your specific model to see if covers are included or available separately.
What's the difference between standard and heavy-duty springs?
Standard springs suit lighter riders and stock bike weight. Heavy-duty springs provide firmer support for heavier riders or loaded touring.
Will these work on my specific Harley model?
Progressive 412s fit multiple Harley platforms, but fitment varies by year and chassis. Confirm your model year and type before ordering.
California Proposition 65 Warning
WARNING: Cancer and Reproductive Harm — California Prop 65 (Y). www.P65Warnings.ca.gov