JT Sprockets Twinstar is a steel/aluminum hybrid rear sprocket built for strong power transfer with reduced rotating weight. A hardened high-carbon steel outer ring delivers long service life, while the 7075-T6 Ergal aluminum core keeps the setup race-light.
Get the durability of steel with the weight savings of aluminum. The JT Sprockets Twinstar Steel/Aluminum Hybrid Sprocket is designed for riders who want long wear life without adding unnecessary rotating mass. With a high-carbon steel outer ring for the teeth and a lightweight 7075-T6 Ergal aluminum core, it helps keep drivetrain performance crisp and consistent ride after ride.
This hybrid construction is ideal when you’re tired of fast-wearing aluminum sprockets but still want a lightweight, race-focused setup. Precision laser cutting and CNC machining deliver accurate fit and an ultra-light “race power” design, while the hardened steel ring is built to take abuse in demanding riding conditions.
