Voca CNC Rear Sprocket 48 Teeth (420) in Red – perfect fit for Derbi/Aprilia/Gilera 50cc

With the Voca CNC rear sprocket with 48 teeth, you get a cleanly manufactured, lightweight, and visually strong upgrade for your 50cc shifter with a Derbi engine. The 48T ratio is ideal if you want a peppier tuning – perfect for Supermoto setups such as Derbi Senda SM or Derbi Senda DRD. Thanks to CNC manufacturing, the sprocket sits reliably and runs precisely on your 420 chain.

Especially on models such as Derbi Senda SM, Derbi Senda DRD, or an Aprilia RS 50 (Derbi engine), the combination of precise workmanship and sporty optics in Red ensures a harmonious overall package – both technically and visually.

Features & Benefits

• 48 Teeth – sporty ratio (more acceleration depending on setup)
• Pitch: 420 – suitable for 420 chains
• CNC-manufactured – precise fit and clean concentricity properties
• Color: Red – high-quality look on the rear wheel
• Brand: Voca – proven quality in the 50cc/Derbi sector

Technical Details

• Product: Rear Sprocket
• Number of teeth: 48
• Chain pitch: 420
• Color: Red
• Part number: VCR-SD450.SDA.48/RE

Compatibility (Excerpt)

Fits many vehicles with Derbi engines, such as Derbi Senda 50 SM/DRD, Aprilia RS 50, or Gilera SMT 50 – but also other models listed below.

• Aprilia
  • RS 50 Derbi engine (2006)
  • RS4 50 Derbi engine (2011)
  • SX 50 Derbi engine (2018–2020)
• Derbi
  • Senda 50 DRD R Pro (2006–2011)
  • Senda 50 DRD SM Racing (2002–2010)
  • Senda 50 SM X-Treme (2014)
  • Senda 50 SM DRD X-Treme Pro Racing (2013–2018)
  • Senda 50 R X-Treme (2018)
  • GPR 50 Racing (2004–2009, 2011–2013)
  • GPR 50 Nude (2004–2012)
• Gilera
  • SMT 50 Euro 4 (2018)
  • SMT 50 SM Racing (2011)

Selection Tip

• Please check chain pitch (420) and number of teeth in your setup before purchasing.
• If you also change the front sprocket, you can fine-tune the ratio even further to your driving style.