Progressive 990 Sport series shock for Harley-Davidson, featuring complete on-bike adjustability across high and low-speed compression, rebound damping, spring preload, and ride height. High-pressure monotube design with deflective disc damping delivers consistent performance throughout the suspension stroke.
Features
- Adjustable High & Low Speed compression damping
- Adjustable rebound damping
- Hand-adjustable spring preload
- 0.4 in adjustable height eyelet
- High-pressure gas monotube construction
- Deflective disc damping through dual circuits
- Lightweight aluminum body
- Linear-rate coil spring
- Captured jounce bumper
Specifications
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Brand: Progressive
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Manufacturer Part #: 990-2004
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Weight: 10.75 lb
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Category: Suspension / Shocks and Struts
Fitment
Fits Harley-Davidson models. Verify specific year and model compatibility with Progressive before ordering.
Frequently Asked Questions
Can I adjust these shocks without tools?
Yes — compression, rebound, and preload all adjust via easily accessible knobs and hand-threaded components on the shock body.
How much does ride height adjust?
The adjustable eyelet provides 0.4 inches of height adjustment for fine-tuning suspension geometry and stance.
What makes the 990 different from standard shocks?
Deflective disc damping routed through dual circuits delivers consistent damping feel throughout the full stroke, improving stability and handling.
Are these street-legal?
Yes — these shocks meet DOT requirements for street use on Harley-Davidson motorcycles.
Do I need a professional to install these?
Installation requires basic tools and mechanical skill, or professional installation is recommended for optimal setup and tuning.
California Proposition 65 Warning
WARNING: Cancer and Reproductive Harm — California Prop 65 (Y). www.P65Warnings.ca.gov