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 a smooth, consistent ride for your Harley-Davidson with their robust double-wall steel construction and nitrogen-charged, multi-stage velocity-sensitive valving. These shocks are a durable and valuable choice for V-twin cruisers, allowing you to dial in comfort for any rider weight using the convenient five-position cam-style preload adjuster.
Why riders pick this
Smooth, consistent ride quality
Durable double-wall steel construction
Nitrogen-charged for fade-free operation
Multi-stage velocity-sensitive damping
5-position cam-style preload adjuster
Available with progressive or heavy-duty springs
Transform your Harley-Davidson's ride quality with the Progressive 412 Series shocks. Engineered to provide superior damping and stability, these shocks significantly improve comfort and handling over stock units. The advanced internal design ensures consistent performance across various road conditions, absorbing bumps and maintaining tire contact for a more confident and enjoyable ride.
Refined Ride, Effortless Adjustments
Double-wall steel damper body for exceptional durability
High-pressure nitrogen gas charging for consistent damping
Multi-stage velocity-sensitive damping for responsive control
5-position cam-style preload adjuster for quick, tool-free tuning
Progressive-rate spring options in chrome or black
Heavy-duty spring variant available for heavier loads
Enhance Your V-Twin Experience
The 412 Series shocks are an ideal upgrade for Harley-Davidson riders looking to improve their bike's performance and comfort. Their straightforward design and effective adjustability make them suitable for a wide range of riding scenarios, from daily commutes to long-distance tours. Pair these reliable rear shocks with a front-end suspension upgrade for a balanced and complete enhancement to your motorcycle's handling.
Specifications
Brand: Progressive
Manufacturer Part #: 412-4035C
Category: Suspension / Shocks and Struts
Weight: 13.1 lb
California Prop 65 Warning: Cancer and Reproductive Harm — www.P65Warnings.ca.gov
Common questions
What does the 5-position preload adjuster do?
The 5-position preload adjuster allows you to quickly adjust the initial compression of the spring to match your weight, riding preference, and load, optimizing ride height and stiffness.
Will these shocks fit my specific Harley-Davidson model?
The Progressive 412 Series is designed for many Harley-Davidson motorcycles. Please use our Shop by Bike tool to confirm the exact fitment for your specific year and model before ordering.
Are these shocks a significant upgrade over factory suspension?
Yes, the Progressive 412 Series shocks offer a noticeable improvement in damping control, ride comfort, and adjustability compared to most factory Harley-Davidson suspension systems.
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.
BRAND
Progressive
TYPE
Shocks and Struts
SKU
T14-614002
WEIGHT
13.1 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
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Dec 25, 2025
Stiff
The shocks seem super nice, but they are incredibly stiff. Turns out they’re 130/200 top to bottom. Would be nice to have an option to choose your spring rate. Couldn’t find it in the description either. Have them installed on a 1998 sportster 1200 by the way. I’m about 180lbs and they don’t move at all, my friend who weighs about 260 also said they were way to firm. Hope this helps.
Progressive 412 Series Shocks - H...
$454.95
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