Renthal 5240-520-49GPSI Twinring Rear Sprocket 49-Tooth 520 Chain Silver

The Renthal 5240-520-49GPSI Twinring Rear Sprocket is a premium 49-tooth, 520-chain-pitch rear chainwheel engineered for off-road and enduro riders who demand maximum durability without sacrificing weight. Built on over 50 years of Renthal sprocket manufacturing expertise, the Twinring delivers the ideal balance of strength and light weight through its patented dual-material construction.

Key Features:

• Dual-Material Twinring Construction: A high-strength Ultralight 7075 T-6 aluminum inner ring is permanently bonded to an electroless nickel-plated steel outer ring, combining the best properties of both materials
• Permanent Thermal Bond: The steel outer ring is expanded to 200°C and fitted to the aluminum inner, creating a bond that lasts the life of the sprocket
• Precision CNC Machined: Individually machined to the tightest possible tolerances for accurate fit, optimal concentricity, and maximum power transfer
• Flat Face Design: Keeps overall weight to a minimum and ensures the Twinring is as narrow as a standard chainwheel, preventing chain guide fouling
• Self-Cleaning Mud Grooves: Renthal's signature mud groove technology is machined between every tooth on both sides, reducing dirt buildup and extending chain and sprocket life
• Flat Socket Head Screws: Add additional lateral strength between the rings during high-velocity side impacts
• Silver Anodized Finish: Grooved silver finish with a 15-step anodizing process that provides corrosion resistance
• 49 Teeth | 520 Chain Pitch

The Renthal Twinring outlasts a standard all-aluminum sprocket while remaining significantly lighter than an all-steel alternative — making it the go-to choice for motocross, supercross, and enduro competition. Sold individually.