Vortex 840AZKV4-39 VTX Aluminum Rear Sprocket 39T

The Vortex 840AZKV4-39 is a high-performance aluminum rear sprocket from Vortex Racing's VTX series, engineered for riders who demand precision, durability, and reduced unsprung weight. Machined from aerospace-grade 7075-T6 aluminum, this sprocket delivers exceptional strength while remaining significantly lighter than stock steel alternatives.

Key Features:

• 39 Teeth — optimized tooth count for performance gearing applications
• Hard anodized aluminum construction — resists wear, corrosion, and chain abrasion for extended service life
• CNC precision machined — tight tolerances ensure smooth, quiet chain engagement and proper fitment
• Lightweight design — reduces unsprung and rotating mass for improved throttle response and handling
• VTX series — Vortex's proven line of replacement and performance sprockets trusted by racers and street riders alike
• Direct OEM replacement fitment — bolt-on installation with no modifications required

The Vortex VTX aluminum rear sprocket is a popular upgrade for sport bike and street motorcycle enthusiasts looking to fine-tune their drive ratio or simply replace a worn sprocket with a quality, performance-oriented component. Paired with a quality chain and front sprocket, this rear sprocket helps complete a precision drivetrain setup.