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. The Progressive 413 Series shocks offer a straightforward and effective upgrade for your Harley-Davidson's suspension. Designed for dependable performance, these shocks enhance comfort and control for various riding conditions. Why riders pick this Five-position cam-style preload adjustment Progressive rate spring for improved comfort Available in Standard or Heavy-Duty options Reliable and durable suspension upgrade Sleek black finish Built for the long haul, Progressive 413 Series shocks provide reliable suspension performance with a focus on rider comfort and adjustability. Each shock features a progressive rate spring, designed to provide a smooth initial response to small bumps and gradually increase resistance for larger impacts. This helps maintain stability and comfort across diverse road surfaces.Simple, Effective Adjustability Five-position cam-style preload adjuster Progressive rate spring for varied road conditions Available in standard or heavy-duty configurations Durable construction for long-lasting performance Sleek black finish for a custom look Tailored for Your RideWith a five-position cam-style preload adjuster, you can easily dial in the right amount of support for your weight, passenger, and cargo without needing special tools. Whether you ride solo or two-up, the 413 Series offers options for Standard or Heavy-Duty spring rates to ensure optimal performance. These shocks are a solid choice for Harley-Davidson riders looking for a significant upgrade in ride quality and adjustability. Specifications Brand: Progressive Manufacturer Part #: 413-4039B Weight: 11.3 lb Category: Suspension / Shocks and Struts WARNING: Cancer and Reproductive Harm — California Prop 65. www.P65Warnings.ca.gov Common questions How do I adjust the preload on these shocks? The five-position cam-style adjuster allows you to change preload easily without tools. Simply turn the cam to one of the five settings to match your weight and riding style. What is the difference between Standard and Heavy-Duty options? Standard shocks are suitable for typical rider weights, while Heavy-Duty springs are designed to handle heavier riders, two-up riding, or carrying significant luggage, providing optimal support and preventing bottoming out. Are these shocks compatible with my specific Harley-Davidson? These shocks are designed for Harley-Davidson models. Please use our Shop by Bike tool to confirm exact fitment for your specific year and model before ordering. 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. {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://vtwinbikers.com"},{"@type":"ListItem","position":2,"name":"Shocks and Struts","item":"https://vtwinbikers.com/collections/all"},{"@type":"ListItem","position":3,"name":"Progressive","item":"https://vtwinbikers.com/collections/progressive"},{"@type":"ListItem","position":4,"name":"Progressive 413 Series Black Shocks - Harley-Davidson","item":"https://vtwinbikers.com/products/progressive-413-shocks-harley-davidson"}]} {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"How do I adjust the preload on these shocks?","acceptedAnswer":{"@type":"Answer","text":"The five-position cam-style adjuster allows you to change preload easily without tools. Simply turn the cam to one of the five settings to match your weight and riding style."}},{"@type":"Question","name":"What is the difference between Standard and Heavy-Duty options?","acceptedAnswer":{"@type":"Answer","text":"Standard shocks are suitable for typical rider weights, while Heavy-Duty springs are designed to handle heavier riders, two-up riding, or carrying significant luggage, providing optimal support and preventing bottoming out."}},{"@type":"Question","name":"Are these shocks compatible with my specific Harley-Davidson?","acceptedAnswer":{"@type":"Answer","text":"These shocks are designed for Harley-Davidson models. Please use our Shop by Bike tool to confirm exact fitment for your specific year and model before ordering."}}]}
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