Vortex 120AZK-37 CAT5 Rear Sprocket 520 Pitch 37 Tooth Aluminum

The Vortex 120AZK-37 CAT5 rear sprocket delivers premium performance and distinctive style for 520 chain applications. This 37-tooth sprocket is precision CNC machined from lightweight 7075-T6 aluminum alloy, providing an excellent strength-to-weight ratio that reduces unsprung weight for improved acceleration and handling.

Key Features:

• 37-tooth configuration for 520 chain pitch
• CNC machined from high-strength 7075-T6 aluminum
• Hard anodized finish for superior wear resistance and corrosion protection
• Unique tooth profile design for extended chain life
• Anodized first, then machined to create striking color contrast with silver highlights
• Significantly lighter than steel sprockets for reduced rotational mass

Vortex CAT5 sprockets are engineered for riders who demand both performance and aesthetics. The anodize-first manufacturing process ensures the color penetrates deep into the aluminum before machining, creating a durable finish that showcases silver accents on the tooth faces and machined surfaces. This sprocket is ideal for street, track, and racing applications where weight savings and durability are critical.