At DMG Motorsports, we present the Vortex Aluminum Rear Sprocket 37T-520, Silver (Part# 211-37 / 3-21137) — the industry-standard racing sprocket trusted by champions and built to shave weight without sacrificing strength. Designed as a direct-fit upgrade for the 2011-2013 Honda CBR250R, this 520 pitch, 37-tooth sprocket delivers the reduced rotating mass that racers and street riders alike demand for sharper acceleration and improved handling. Whether you're chasing lap times or simply want a lighter, better-looking replacement for your factory steel sprocket, this Vortex sprocket is engineered to perform.

Features:

• CNC machined from 7075 aluminum for an ideal balance of strength and light weight
• CNC machined from 7075 aluminum for amazing strength and light weight
• Saber tooth grooves; unique tooth design increases sprocket longevity
• Lighter compared to OEM steel sprockets, leading to reduced rotating mass and improved acceleration and handling
• 520 pitch, 37-tooth configuration, silver finish
• Direct-fit compatibility with 2011-2013 Honda CBR250R
• Race-proven design trusted by champions across motorcycle racing disciplines
• Manufactured by U.S.-based Vortex Racing, which has produced top-quality motorcycle racing components for Motocross, Supercross, Road Racing, Flat Track Racing and Minibikes for more than 15 years

Fitment