Vortex 825ZLV4-45 V4 Aluminum Rear Sprocket 45-Tooth

The Vortex 825ZLV4-45 is a 45-tooth aluminum rear sprocket built around Vortex Racing's newest V4 sprocket design, introduced in 2026. The V4 platform delivers a 10–15% weight reduction over the iconic CAT5 design without sacrificing structural integrity, achieved through an optimized lightening pattern and machined faces on both sides.

Key Features:

• V4 Design: Vortex's latest generation sprocket pattern — lighter and more performance-focused than the classic CAT5
• 45-Tooth Rear Sprocket: Tuned for increased low-end torque and improved acceleration response
• Aerospace-Grade Aluminum Construction: CNC machined from a specially formulated alloy per Vortex specifications for optimal strength-to-weight ratio
• 100% CNC Manufactured in the USA: Precision machined for consistent quality and exact tolerances
• Anodized Finish: Protective coating applied before cutting, creating Vortex's signature two-tone machined appearance while resisting corrosion
• Unique Tooth Design: Engineered tooth geometry helps extend sprocket longevity under demanding conditions

Aluminum sprockets are highly sensitive to chain cleanliness and tension. For best results and maximum service life, clean and adjust chain tension every 300–600 miles on street bikes. The 825ZLV4-45 is an excellent choice for riders looking to reduce rotating mass and fine-tune their gear ratio for improved performance on the street or track.