Fusion Dual Rear Sprocket

Get steel-level durability without the heavy feel. The Moto-Master Fusion Dual Rear Sprocket is built for riders who want a longer-lasting rear sprocket while keeping rotating mass down for better throttle response. By combining a special hardened, nickel-coated steel outer ring with an aircraft-grade 7075-T6 aluminum carrier, it delivers an excellent balance of wear resistance and weight savings.

This dual-material design helps you spend less time swapping worn sprockets and more time riding. The outer ring and carrier are precisely manufactured and permanently interlocked using a specialized heat-shrink procedure for a secure, long-term bond—ideal for demanding off-road use.

Key features:

• ✅ Hardened, nickel-coated steel outer ring for high wear resistance
• ✅ 7075-T6 aluminum carrier for reduced weight and strong performance
• ✅ Precision CAD/CNC/laser-cut manufacturing for consistent fit and accuracy

Benefits of use:

• 🔹 Longer service life—can outlast an aluminum sprocket up to 3 times
• 🔹 Lighter drivetrain feel—about 50% less weight than a typical steel sprocket
• 🔹 Durable finish—anodized carrier coating adds extra protection

Technical specifications:

• 📌 Brand/Model: Moto-Master Fusion (Dual)
• 📌 Mounting position: Rear
• 📌 Chain size: 420
• 📌 Tooth count: 49T
• 📌 Material: Steel outer ring + 7075-T6 aluminum carrier
• 📌 Color/Finish: Black
• 📌 Vendor part number: 620063249

Why choose this product?

⭐ Built to combine durability and low weight in one sprocket
⭐ High-precision construction for a reliable, performance-focused upgrade
⭐ A smart choice when you want long life without sacrificing response