444 Series, 12.5in. Standard Spring Rate Rear Shock Absorbers - Chrome. Fits Dyna 1991-2017. - Progressive Suspension Cam Chest/Cams/Oil Pump - T/Cam 023up or Street Glide &

023up or Street Glide & Road Glide 2024up

* On 1991-2021 XL models

Windshield designs developed using CFD may be analyzed with hundreds of variations before prototypes are tested in real-world riding conditions to validate the results

* Transmissions built after mid 1976

444 Series, 12.5in. Standard Spring Rate Rear Shock Absorbers - Chrome. Fits Dyna 1991-2017. - Progressive Suspension Cam Chest/Cams/Oil Pump - T/Cam 023up or Street Glide &Features & Benefits: * 444 Series Shock. * Frequency Sensing Technology (FST) dynamically adjusts Damping. * Deflective disk valving ensures high performance ride control. * Threaded pre load adjusters for tool less adjustment. * Hand built, tuned & dynod in Progressives facility. Tech Tips: * Standard Spring Rates are recommended for riders that weigh under 110kg. * Heavy Duty Spring Rates are recommended for riders that weigh over 110kg, or for