RAP adjustable. 422 series - Better. Two inches; standard to 2" lower; of ride height adjustment and adjustable preload. High pressure gas system in a dual coil shock system. The shocks include a new fill valve to replace the stock one. Also available in the RAP (Remote Adjustable Preload) series; which comes with the added convenience of a Remote Adjustable Preload; located behind the left passenger peg; for easier accessible adjustments. What are Progressive Suspension''s ''Heavy Duty'' shocks? If you are a lightweight rider with a lightweight passenger; STD Duty is probably your best choice; heavy duty shocks will give you a harsh ride. For Big Guys & Gals with a lot of baggage; Heavy Duty springs are the way to go. Heavy Duty is not better; it''s different.Heavy Duty shocks or springs are recommended to be used on motorcycles that are operated at or near the manufacturers maximum load rating over 50% of the time.

990 Sport series - Best. With bushing. Based on the 970 series but designed towards aggressive sport/race inspired riding. No other shock offers this much tuning adjustability. Features include a linear rate coil spring; a 0.4" adjustable eyelet height and adjustable threaded preload; a piggyback reservoir (remote for Touring) has a knob to adjust both rebound and high & low speeds compression damping. Featured in a lightweight aluminum body the high-pressure monotube with deflective disc damping routed through two unique circuits delivers a consistent feel through the damper stroke for improved performance and stability. A new and improved engineered jounce bumper features a captured design to help smooth and control bottoming out. Each shock is hand-built & dyno tested to deliver real world performance.What are Progressive Suspension''s ''STD Duty'' vs ''Heavy Duty'' shocks? If you are a lightweight rider with a lightweight passenger; STD Duty is probably your best choice; heavy duty shocks will give you a harsh ride. For Big Guys & Gals with a lot of baggage; Heavy Duty springs are the way to go. Heavy Duty is not better; it''s different.Heavy Duty shocks or springs are recommended to be used on motorcycles that are operated at or near the manufacturers maximum load rating over 50% of the time. Note: Remote reservoir strut mounts. For a different; wild & aggressive look see 941797 Progressive Suspension''s (alternative style) remote rear reservoir fender strut cover mount

444 series shocks: Comes with FST (Frequency Sensing Technology) which dynamically adjusts damping; according to road surface. Top mount threaded hand adjustable preload. Note: Optionally available is 704545 for an optional QPS (Quick Preload System) adjustment kit. It replaces the stock upper shock caps of all 444 & 944 series Touring shocks; allowing quick preload adjustment without removing the saddlebags. What are Progressive Suspension''s ''Heavy Duty'' shocks? If you are a lightweight rider with a lightweight passenger; STD Duty is probably your best choice; heavy duty shocks will give you a harsh ride. For Big Guys & Gals with a lot of baggage; Heavy Duty springs are the way to go. Heavy Duty is not better; it''s different.Heavy Duty shocks or springs are recommended to be used on motorcycles that are operated at or near the manufacturers maximum load rating over 50% of the time.

412 series shocks: Best value Progressive Suspension shock; great as stock replacement. Nitrogen charged double steel wall body. Multi-staged velocity sensitive valving. Five position cam style preload adjustment. What are Progressive Suspension''s ''Heavy Duty'' shocks? If you are a lightweight rider with a lightweight passenger; STD Duty is probably your best choice; heavy duty shocks will give you a harsh ride. For Big Guys & Gals with a lot of baggage; Heavy Duty springs are the way to go. Heavy Duty is not better; it''s different.Heavy Duty shocks or springs are recommended to be used on motorcycles that are operated at or near the manufacturers maximum load rating over 50% of the time.

490 series - Sport Series. A true sport performance shock; with a competitive price tag. Features a high pressure nitrogen monotube with deflective disc technology and a linear rate spring for the most consistent feel throughout the damper stroke on both street and track. Preload and rebound adjustability by hand. An engineered jounce bumper with a built-in metal cup smooths and controls bottoming out.What are Progressive Suspension''s ''STD Duty'' vs ''Heavy Duty'' shocks? If you are a lightweight rider with a lightweight passenger; STD Duty is probably your best choice; heavy duty shocks will give you a harsh ride. For Big Guys & Gals with a lot of baggage; Heavy Duty springs are the way to go. Heavy Duty is not better; it''s different.Heavy Duty shocks or springs are recommended to be used on motorcycles that are operated at or near the manufacturers maximum load rating over 50% of the time.

412 series shocks: Best value Progressive Suspension shock; great as stock replacement. Nitrogen charged double steel wall body. Multi-staged velocity sensitive valving. Five position cam style preload adjustment. Note: Black 412 shocks may be supplied without lower cover. What are Progressive Suspension''s ''Heavy Duty'' shocks? If you are a lightweight rider with a lightweight passenger; STD Duty is probably your best choice; heavy duty shocks will give you a harsh ride. For Big Guys & Gals with a lot of baggage; Heavy Duty springs are the way to go. Heavy Duty is not better; it''s different.Heavy Duty shocks or springs are recommended to be used on motorcycles that are operated at or near the manufacturers maximum load rating over 50% of the time.

430 series - Better. High pressure nitrogen charged with deflective disc damping. Threaded preload adjuster will allow adjustment without tools. Chromed steel body with machined aluminum spring covers. These shocks can be mounted upside down if desired. With chrome covers and chrome springs or black covers with black springs.What are Progressive Suspension''s ''Heavy Duty'' shocks? If you are a lightweight rider with a lightweight passenger; STD Duty is probably your best choice; heavy duty shocks will give you a harsh ride. For Big Guys & Gals with a lot of baggage; Heavy Duty springs are the way to go. Heavy Duty is not better; it''s different.Heavy Duty shocks or springs are recommended to be used on motorcycles that are operated at or near the manufacturers maximum load rating over 50% of the time.

944 series - Best. For Touring models. Designed with dual springs to give a 1" lower bike while riding or on the side stand. Still retains full travel and length for uncompromised smooth cruising. Comes with FST (Frequency Sensing Technology) which dynamically adjusts damping; according to road surface. The 12.5" Ultra Low version drops Street Glides 1" and a 2" drop for most other Tourings; with minimal loss in ride quality.What are Progressive Suspension''s ''STD Duty'' vs ''Heavy Duty'' shocks? If you are a lightweight rider with a lightweight passenger; STD Duty is probably your best choice; heavy duty shocks will give you a harsh ride. For Big Guys & Gals with a lot of baggage; Heavy Duty springs are the way to go. Heavy Duty is not better; it''s different.Heavy Duty shocks or springs are recommended to be used on motorcycles that are operated at or near the manufacturers maximum load rating over 50% of the time.