Vortex 825A-55 Aluminum Rear Sprocket 55T

The Vortex 825A-55 is a high-performance 55-tooth aluminum rear sprocket designed for motorcycle applications. Vortex is a leading manufacturer of precision-machined drivetrain components trusted by racers and street riders alike.

Machined from lightweight, high-strength aluminum, this sprocket delivers a significant weight reduction over stock steel sprockets without sacrificing durability. The precision CNC-machining ensures consistent tooth geometry for smooth, reliable chain engagement and extended sprocket life.

Key Features:

• 55 Teeth — provides increased rear wheel torque and improved acceleration
• Lightweight aluminum construction — reduces unsprung and rotating mass
• CNC-machined precision — exact tooth profiles for quiet, consistent chain engagement
• Hard anodized finish — resists corrosion and wear for long service life
• Direct OEM replacement fitment — bolt-on installation with no modifications required

The Vortex 825A-55 rear sprocket is an excellent upgrade for riders looking to fine-tune their motorcycle's gearing for the track or street. A higher tooth count compared to stock delivers stronger low-end pull and improved acceleration at the cost of slightly reduced top speed.