Progressive 990 Shocks — Harley-Davidson Sportster 1200 Custom, Sportster 883, Sportster 883 Hugger (1972-2026)

Progressive 990 shocks are fully adjustable monotube rear suspension for Harley Sportster 990 models, featuring high and low speed compression damping, rebound adjustment, and tool-free preload tuning. The high-pressure design with deflective disc damping delivers consistent performance through the full stroke for improved stability and cornering.

Features

• Adjustable High and Low Speed compression damping
• Adjustable rebound damping
• Tool-free hand-adjustable spring preload
• 0.4 in adjustable height eyelet
• High-pressure gas monotube design
• Deflective disc damping through dual circuits
• Linear rate coil spring
• Lightweight aluminum body
• Captured jounce bumper

Specifications

• Brand: Progressive
• Manufacturer Part #: 990-1004
• Category: Suspension / Shocks and Struts
• Weight: 10 lb
• WARNING: Cancer and Reproductive Harm — California Prop 65. www.P65Warnings.ca.gov

Fitment

Fits Harley-Davidson Sportster 990 models.

Frequently Asked Questions

How much height adjustment do these shocks offer?

The eyelet adjusts 0.4 inches, allowing you to fine-tune ride height and suspension geometry without replacing the shocks.

Can I adjust these shocks without special tools?

Yes. Spring preload adjusts by hand, and compression/rebound damping knobs are accessible without removing the wheels or suspension.

Will these fit my 1200 or 883 Sportster?

No — these are designed specifically for Sportster 990 models. 883 and 1200 Sportsters use different mounting points and shock lengths.

What makes the monotube design better than conventional shocks?

Monotube shocks run high-pressure gas, which improves responsiveness and allows dual damping circuits for better control throughout the stroke.

Do I need to bleed air or adjust anything before riding?

No special bleeding required. Set preload to your weight, then dial in compression and rebound to your preference and riding style.

California Proposition 65 Warning

WARNING: Cancer and Reproductive Harm — California Prop 65 (Y). www.P65Warnings.ca.gov