About Progressive
Progressive Suspension has focused exclusively on American V-twin suspension since 1982, and its Monotube fork cartridges and 400/970/970G shock series are among the most common upgrades on baggers and Softails. For most riders the stock rear shock is the single worst part on the bike — this is the fix.
Progressive 412 Series shocks deliver smooth, consistent damping through a double-wall steel body and nitrogen-charged, multi-stage velocity-sensitive valving. The five-position cam-style preload adjuster lets you dial in your ride for light or heavy loads, making them a durable, adjustable upgrade for Harley-Davidson cruisers. Experience a noticeable improvement in ride quality.
Why riders pick this
- Smooth, consistent damping for improved comfort
- Robust double-wall steel body construction
- Nitrogen-charged for consistent performance
- Multi-stage velocity-sensitive valving
- 5-position cam-style preload adjuster
Elevate your Harley-Davidson's ride with the Progressive 412 Series shocks, engineered for riders who demand better performance and comfort. These shocks provide superior control over bumps and road imperfections, contributing to a more stable and enjoyable journey. Their robust construction is built to endure the rigors of the road, ensuring long-lasting reliability and consistent damping.
Precision Tuned for Your V-Twin
- Durable double-wall steel damper construction
- Multi-stage velocity-sensitive damping for responsive control
- High-pressure nitrogen charging for consistent, fade-free performance
- 5-position cam-style preload adjuster for quick, tool-free setup
- Available with progressive or heavy-duty spring rates
Optimizing Your Harley's Ride
The easily accessible 5-position preload adjuster means you can quickly adapt your Harley's suspension to suit varying loads, whether you're riding solo, with a passenger, or fully loaded for a long trip. This adjustability is crucial for maintaining proper handling and comfort, preventing bottoming out and ensuring a composed ride. These shocks are a foundational step towards a fully optimized V-twin suspension system.
Specifications
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Brand: Progressive
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Manufacturer Part #: 412-4045B
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Category: Suspension / Shocks and Struts
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Weight: 10.7 lb
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WARNING: Cancer and Reproductive Harm — California Prop 65. www.P65Warnings.ca.gov
Common questions
Can I adjust the preload myself?
Yes, the 5-position cam-style adjuster is tool-free and lets you dial preload up or down for your weight and riding preference.
Will these shocks fit my Harley Touring model?
Yes, these Progressive 412 Series shocks are designed to fit many Harley Touring, Softail, and Dyna models. Please use our Shop by Bike tool to confirm exact fitment for your specific year and model before ordering.
Are different spring rates available for heavier riders?
Yes, these shocks are available with progressive or heavy-duty spring rates to accommodate different rider weights and loads.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.