PROGRESSIVE SUSPENSION 412 Series Shocks — 305 mm (12.00") rear, black/chrome – 85 Big Twin, 80-90 Touring, 82-91, 93-94 FXR, 77-95 Sportster

Designed specifically for Harley models, the 412 Series provides a simple, durable upgrade to suspension performance that keeps costs down. 🔧

A five-position cam-style spring preload adjuster makes it easy to dial in ride comfort and control. ⚙️

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

All shocks are measured center-of-eyelet to center-of-eyelet. Slight changes in length can alter head angle and steering: a slightly longer shock may quicken steering, while a slightly shorter shock may slow it.

Heavy duty applications are recommended for bikes operated at or near the manufacturer's maximum load rating more than half the time.

Before purchasing or installing shocks with lengths different than OEM, confirm that wheel travel can be altered without causing clearance issues with the swingarm, axle, exhaust, chain/belt guard, or tire.