Vortex 210ZB-51 Blue 51-Tooth 520-Pitch CAT5 Aluminum Rear Sprocket

The Vortex 210ZB-51 is a 51-tooth, 520-pitch CAT5 aluminum rear sprocket finished in an anodized blue with machined silver highlights. Engineered by Vortex Racing — a U.S.-based manufacturer trusted by professional road racing, motocross, and supercross teams worldwide — this sprocket delivers race-proven performance for street and track riders alike.

Vortex's CAT5 sprockets are anodized first, then CNC-machined from lightweight 7075 T6 billet aluminum, resulting in a visually striking two-tone finish combined with exceptional structural integrity. The unique saber tooth groove design and precision tooth profile ensure smooth chain engagement, consistent power transfer, and extended service life.

Key Features:

• 51-tooth count for tuned rear gearing and acceleration characteristics
• 520-pitch chain compatibility — ideal for OEM 520 applications or 520 conversion setups
• 7075 T6 billet aluminum construction — strong, lightweight, and race-tested
• CAT5 anodized blue finish with CNC-machined silver highlights for a premium appearance
• Saber tooth groove design for improved chain hold, release, and longevity
• Significantly lighter than OEM steel sprockets, reducing rotating mass for improved throttle response and handling
• 100% CNC machined to the tightest tolerances for precise fitment
• Tested and trusted by world-class professional race teams

The Vortex 210ZB-51 rear sprocket is a direct upgrade for riders looking to reduce unsprung weight, fine-tune their final drive gearing, and add a flash of color to their drivetrain. Always replace the rear sprocket in conjunction with a new chain and front sprocket for optimal performance and longevity.