PROGRESSIVE SUSPENSION 412 Series Shocks — 343 mm (13.50") extended length, rear – 57-85 Sportster

Designed specifically for Harley models, the 412 Series shocks deliver a simple, durable upgrade to your motorcycle's suspension performance.

A five-position cam-style spring-load preload adjuster lets you easily dial in your ride.

Some or all shocks listed are approved for road use; refer to the most recent certificate for the current listing.

All shocks are measured center-of-eyelet to center-of-eyelet. When installing shocks on '86-'15 XL models, it may be necessary to modify or space the chain/belt guard to allow proper clearance.

A shock slightly longer than stock may alter the head angle and provide somewhat quicker steering, while a slightly shorter shock may provide somewhat slower steering.

Heavy duty applications are recommended for bikes operated at or near the manufacturer's maximum load rating over 50% of the time.

Before purchasing or attempting to install shocks that differ from the OEM length, confirm that wheel travel can be altered without causing clearance issues such as swingarm/axle to exhaust contact, chain/belt guard interference, or tire contact.

Made in the USA. 🏍️