The Renthal Twinring™ Rear Sprocket is designed for riders who want maximum drivetrain durability without adding unnecessary rotating weight. By combining a high-strength 7075‑T6 aluminum inner ring with an electroless nickel-coated steel outer ring, Twinring delivers long service life in abrasive mud and sand while keeping your bike feeling responsive.
This two-piece construction is engineered to stay permanently bonded: the steel outer ring is expanded at 200°C and interference-fitted over the aluminum inner ring, with a wave pattern that helps ensure a secure, long-lasting connection. Add in self-cleaning mud grooves between every tooth and you get a sprocket that resists dirt build-up, reduces wear, and stays efficient in harsh conditions.
Key features:
✅ 7075‑T6 Ultralight™ aluminum inner ring for strength with low weight
✅ Electroless nickel-coated steel outer ring designed for ultimate durability with minimal material
✅ Interference fit + wave pattern construction for a permanent bond for the life of the chainwheel
Benefits of use:
🔹 Lasts up to 3× longer than a standard all-aluminum sprocket
🔹 Lighter than an all-steel rear sprocket for better acceleration and handling feel
🔹 Self-cleaning grooves reduce mud build-up, wear, and unnecessary weight
Technical specifications:
📌 Brand: Renthal
📌 Model: Twinring™
📌 Mounting position: Rear
📌 Chain size: 520
📌 Tooth count: 50T
📌 Material: 7075‑T6 Aluminum (inner) + nickel-coated steel (outer)
📌 Color/Finish: Green
📌 Units: Each
Why choose this product?
⭐ Premium dual-material design built for serious motocross/enduro wear conditions
⭐ Smart construction details (impact-resistant fasteners, mud grooves) for reliability race after race
⭐ A proven upgrade when you want steel-like longevity without the full-steel weight penalty
