At DMG Motorsports, we present the Vortex Aluminum Rear Sprocket 39T-520 in Silver (part number 211-39) — the race-proven standard trusted by riders who demand strength, precision, and a lighter spinning mass at the rear wheel. Built for the 11-13 Honda CBR250R and designed as a direct 520-pitch upgrade, this sprocket swaps out the heavier factory steel piece for a purpose-built aluminum component engineered by Vortex Racing, a U.S.-based manufacturer with a long history of building components for Motocross, Supercross, Road Racing, Flat Track, and Minibike competition.

Every Vortex sprocket is machined to tight tolerances and put through real track testing with feedback from professional race teams, so you're getting a component that's been proven at the highest levels before it ever reaches your bike. Whether you're chasing lap times or simply want a lighter, better-looking, longer-lasting sprocket, DMG Motorsports makes it easy to add this Vortex upgrade to your build.

Features:

• CNC machined from 7075 aluminum for outstanding strength paired with light weight
• Unique saber tooth grooves for a distinctive, race-inspired tooth design
• 39-tooth, 520 pitch configuration finished in silver
• Fits 2011-2013 Honda CBR250R
• Reduced rotating mass compared to OEM steel sprockets, aiding acceleration and handling
• Manufactured by Vortex Racing, a U.S. company focused on top-quality racing components
• Made to tight tolerances and track-tested with input from professional race teams
• Trusted by champions across multiple forms of motorcycle racing

Fitment