Ohlins DU321 STX46 Street S46DR1 Rear Shock Absorber for Ducati Monster

The Öhlins DU321 is a high-performance rear shock absorber from Öhlins' well-proven STX 46 Street lineup, engineered specifically for Ducati Monster series motorcycles. Designed as a direct bolt-on performance upgrade over the stock rear suspension, it delivers a noticeable improvement in handling precision and ride quality for both street and aggressive canyon riding.

The STX 46 Street platform is built around a monotube, high-pressure gas design utilizing a large 46mm main piston paired with an internal gas reservoir integrated within the main shock body. The shock designation S46DR1 indicates a single-tube 46mm piston with internal reservoir and adjustable rebound damping.

Key Features:

• 46mm monotube design — large main piston for responsive, consistent damping
• Internal gas reservoir — compact, clean installation without external reservoir plumbing
• 30-stage rebound damping adjustment — fine-tune shock behavior to match riding style and road conditions
• Stepless spring preload adjustment — double-nut type preload adjuster for precise sag setting
• Forged aluminum cylinder head and aluminum cylinder body — lightweight construction without sacrificing durability
• Factory spring rate: 100 N/mm — optimized for a rider weight of approximately 175 lbs (80 kg)
• Optional hydraulic spring pre-loader compatible for additional stance adjustability

Technical Specifications:

• Model Type: STX 46 Street — S46DR1
• Extended Length: 305 mm (12.0 in)
• Stroke: 66 mm (2.6 in)
• Spring Rate: 100 N/mm
• Mounted Spring: 01091-34

The Öhlins DU321 is a proven suspension upgrade for Ducati Monster riders seeking improved cornering confidence, better feedback, and a more planted feel over all road surfaces.