JT SPROCKETS

JT Sprockets Twinstar rear sprocket for 520 chain combines low weight with long service life thanks to its dual-material construction. Computer-designed strength and premium materials help deliver reliable power transfer and consistent wear.

• 520 chain compatibility with 51T tooth count
• T6 aluminum center + high-carbon steel outer ring
• Heat-treated & bead-blasted to reduce surface tension and improve durability

The JT Sprockets Twinstar hybrid rear sprocket combines long-wearing steel teeth with a lightweight 7075‑T6 Ergal aluminum core for race-ready performance. Designed to deliver efficient power transfer with reduced rotating mass.

• Size: 520 chain, 48T rear
• Materials: heat-induction hardened high-carbon steel ring + 7075‑T6 aluminum core
• Build: precision laser cut & CNC machined for ultra-light design

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.

• 520 chain size, 49-tooth rear drive sprocket
• Heat-induction hardened high-carbon steel outer ring
• Lightweight 7075-T6 aviation-grade Ergal aluminum core (black/gold)

JT Sprockets Twinstar hybrid rear sprocket combines a hardened steel outer ring with a lightweight 7075-T6 aluminum core for excellent durability without extra weight.

Built for strong, consistent power transfer and long service life in demanding off-road use.

• 520 chain size, 50T rear drive sprocket
• Heat-induction hardened high-carbon steel outer ring
• CNC/laser precision-made, black/gold finish

JT Sprockets Twinstar hybrid rear sprocket combines long-lasting steel wear performance with a lightweight 7075-T6 Ergal aluminum core for fast acceleration and efficient power transfer. Built with precision laser cutting and CNC machining for race-ready fit and strength.

• 520 chain compatibility with 51T rear tooth count
• Heat-induction hardened high-carbon steel outer ring for extended life
• Lightweight 7075-T6 aluminum core (black/gold finish)

JT Sprockets Twinstar hibridni zadnji zobnik združuje vzdržljiv zunanji jekleni obroč z lahkim jedrom iz 7075-T6 aluminija za močan in konsistenten prenos pogona. Zasnovan je za verigo 520 ter ponuja dolgo življenjsko dobo brez teže, značilne za povsem jeklene zobnike.

• Zadnji pogonski zobnik, 48T za verigo 520
• Toplotno indukcijsko kaljen zunanji obroč iz visokogljičnega jekla
• Jedro iz letalskega 7075-T6 (ergal) aluminija, CNC/lasersko rezano