Vortex 775BZR-37 Black Aluminum 37-Tooth 525 Rear Sprocket

The Vortex 775BZR-37 is a 37-tooth, 525-pitch rear sprocket machined from high-grade aluminum alloy and finished in Vortex's distinctive black-with-silver-accent style. The sprocket is anodized black first, then CNC machined to expose bright aluminum highlights — delivering a trick, race-ready appearance without sacrificing structural integrity.

Key Features:

• 37-Tooth / 525 Pitch — direct replacement tooth count and chain pitch
• Black anodized aluminum construction — lightweight design reduces rotating mass for improved throttle response and acceleration
• CNC machined in the USA — precision manufacturing ensures concentricity and consistent chain engagement
• Vortex patented tooth profile — unique tooth geometry increases sprocket longevity and reduces chain wear
• Lightening pockets — strategically placed cutouts further reduce unsprung rotational weight
• Black with machined silver accent finish — anodized before machining for a durable two-tone look

Vortex rear sprockets are a popular upgrade for riders looking to replace worn OEM sprockets or fine-tune their final drive ratio. A higher tooth count rear sprocket (relative to stock) sharpens low-end acceleration and mid-range response, making this an ideal choice for street and track use alike.