Vortex 817-55 CAT5 Aluminum Rear Sprocket 55-Tooth 520 Pitch

The Vortex 817-55 is a 55-tooth, 520-pitch CAT5 aluminum rear sprocket engineered for serious street and track riders who demand race-proven drivetrain performance. Manufactured in the USA by Vortex Racing, this sprocket is machined from high-grade 7075-T6 aluminum alloy and hard anodized for durability and corrosion resistance.

Key Features:

• 55-Tooth / 520 Pitch: Delivers increased low-end torque and quicker acceleration off corners
• 7075-T6 Aluminum Construction: Aerospace-grade alloy provides an optimal balance of strength and reduced unsprung weight
• Hard Anodized Finish: Silver anodized coating resists corrosion and wear for extended service life
• Vortex Patented Tooth Design: Unique tooth profile maximizes chain engagement and increases sprocket longevity
• Race-Tested: Manufactured to the tightest tolerances and validated by professional race teams worldwide
• USA Made: Produced at Vortex Racing's facility in Salt Lake City, UT

Vortex Racing aluminum rear sprockets are a direct upgrade over OEM steel sprockets, offering significant weight savings without sacrificing strength or reliability. The 817-55 is part of Vortex's extensive rear sprocket lineup and is built to the same standards used by championship-winning teams in AMA Superbike, Supercross, and motocross competition.