Vortex 628ZK-57 Aluminum Rear Sprocket Chain Sprockets - CAT5 57-Tooth 415

The Vortex 628ZK-57 is a 57-tooth CAT5 aluminum rear sprocket designed for 415-pitch chain applications. Built for performance-oriented riders and racers, this sprocket delivers a lightweight alternative to OEM steel units, helping reduce rotating mass for improved throttle response and acceleration.

Key Features:

• 57-tooth rear sprocket for fine-tuned gear ratio adjustment
• 415-pitch chain compatibility — designed for chain conversion applications
• CAT5 aluminum construction — anodized first, then CNC machined for a black finish with distinctive silver machined accent highlights
• Specially formulated alloy per Vortex specifications for optimal strength-to-weight ratio
• Vortex patented tooth profile engineered for smooth chain engagement and extended sprocket longevity
• 100% CNC manufactured in the USA to tight tolerances
• Anodized finish resists corrosion and wear

The Vortex 628ZK-57 is a bolt-on upgrade that allows riders to dial in their final drive gearing for maximum performance. Adding rear sprocket teeth increases low-end torque and acceleration off the line, making this an ideal choice for track use or riders seeking quicker acceleration from their motorcycle.