CNC Aluminum Box-Section Swingarm – matte black anodized for Simson S50 / S51 / S70

This CNC-milled box-section swingarm from Schmitt is made of high-quality aluminum and is matte black anodized. Due to the significantly higher rigidity, it provides you with noticeably more stable handling and greater precision – exactly what you need for your Simson S51, Simson S50 or Simson S70 during sporty riding and tuning.

The swingarm is ideal, especially for powerful setups: it is perfectly suited for the absorption and transmission of forces from powerful tuning engines and remains reliable and durable. Additionally, you receive CNC-manufactured chain tensioners included, so that you can adjust the chain tension cleanly and accurately.

Advantages & Features

• CNC-milled and made of high-quality aluminum
• Matte black anodized (robust, high-quality surface)
• Higher rigidity for improved handling and more precise control
• Ideal for tuning engines – designed for high forces
• Compatible with drum and disc brake kits
• Suitable for all swingarm bushings with original dimensions
• High build quality for maximum reliability and durability
• Including CNC chain tensioners for exact chain tension adjustment

Technical Details

• Version: box-section swingarm
• Manufacturing: CNC-milled
• Material: aluminum
• Surface: matte black anodized
• Brake: suitable for drum and disc brake kits
• Bushing dimension: suitable for swingarm bushings in original dimensions
• Scope of delivery: box-section swingarm + CNC-manufactured chain tensioners
• OEM number (comparison purposes): 203741

Compatibility

Fits many Simson models, such as Simson S50, Simson S51, Simson S53 and others (see list):

• Simson: S 50 B2 50 3-speed electronic (1976-1980)
• Simson: S 51 B2-4 50 4-speed (1980-1989)
• Simson: S 53 B 50 4-speed (1990-1994)
• Simson: S 50 B1 50 4-speed (1976-1980)
• Simson: S 83 80 4-speed Beta (1994-1996)
• Simson: S 70 EII 70 4-speed (1985-1989)
• Simson: S 50 B 50 3-speed (1975-1976)
• Simson: S 50 N 50 3-speed (1975-1980)

Tip: If you are looking for a rigid, cleanly processed upgrade swingarm for your Simson S51 or Simson S50, this CNC box-section swingarm is a strong basis – especially for more powerful setups.

Part number: STT55785

Note: OEM number is for comparison purposes only.