PROGRESSIVE SUSPENSION 412 Series Shocks — 343 mm (13.5") extended length, rear – 85 Big Twin, 80-06 Touring, 00-05 CVO, 82-94 FXR, 77-22 Sportster

The 412 Series shocks are engineered for Harley motorcycles to deliver improved suspension performance with a simple, durable design that provides a cost‑effective upgrade.

A five‑position cam‑style spring preload adjuster lets you dial in your ride quickly and precisely.

• Durable construction suitable for everyday use and heavy‑duty applications when required.
• All shocks are measured center‑of‑eyelet to center‑of‑eyelet for accurate fitment checks.
• Before changing from OEM length, confirm wheel travel and clearance to avoid swingarm, exhaust, chain/belt guard, or tire contact.
• Installation on some XL models ('86–'15) may require modification or spacing of the chain/belt guard for proper clearance.

Some listings are approved for road use; refer to the most recent certificate for current coverage.