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The Renthal Twinring™ Rear Sprocket, part number 1120-520-50GPBK, is engineered for high performance and durability in off-road and motocross applications. Crafted with an inner ring made from high-strength Ultralight™ 7075 T-6 aluminum, this sprocket offers outstanding strength-to-weight ratio, reducing overall bike weight without sacrificing durability. The outer ring is constructed from electro-less nickel-coated steel, providing exceptional resistance to wear and corrosion, and is designed with minimal material to keep the weight down while maintaining strength. The outer ring is expanded at 200°C and fitted over the inner ring with an interference fit, ensuring a permanent bond that withstands the rigors of aggressive riding and prolonged use. The wave pattern further enhances the bond, making this sprocket highly reliable over its lifespan.
In addition to its robust construction, the design incorporates flat socket head screws that increase strength during side impacts and prevent contact with the chain guide. The sprocket features self-cleaning mud grooves between each tooth, which effectively reduce dirt buildup and minimize wear, contributing to smoother chain operation and longer service life.
Compared to standard all-aluminum sprockets, the Twinring™ lasts approximately three times longer, thanks to its steel outer ring and innovative bonding method, yet it remains significantly lighter than an all-steel sprocket. This combination of durability, weight savings, and performance makes the Renthal Twinring™ rear sprocket an excellent upgrade for riders seeking reliability and efficiency in demanding riding conditions.
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