Renthal 5240-520-48GPBK Twinring Rear Sprocket 48T 520 Black

The Renthal 5240-520-48GPBK is a Twinring rear sprocket featuring a 48-tooth count and 520 chain pitch in a black finish. Drawing on over 50 years of motocross sprocket manufacturing expertise, the Twinring is engineered for off-road, motocross, and enduro riders who demand maximum durability without sacrificing performance.

Key Features:

• Dual-material Twinring construction: A hardened steel outer chain ring is heated to 200°C and permanently press-fitted onto a lightweight aluminum inner core, creating an inseparable bond for the full life of the sprocket
• 7075 T-6 aluminum inner: High-strength, ultralight aluminum alloy significantly reduces unsprung rotational weight at the rear wheel for improved power transfer and acceleration
• Electroless nickel-coated steel outer ring: Provides exceptional wear resistance and corrosion protection on the chain-contact surface
• Self-cleaning mud grooves: Machined between every tooth on both sides to prevent dirt and debris buildup in demanding off-road conditions
• Flat socket head screws: Reinforce the bond between inner and outer rings during high-velocity side impacts
• Precision CNC machined: Manufactured to extremely tight tolerances for accurate tooth profile, concentricity, and optimal chain engagement
• 48 teeth / 520 chain pitch: Compatible with standard 520-series drive chains
• Black anodized finish: Hard-anodized surface for increased longevity and a clean, aggressive appearance

The Renthal Twinring delivers the best of both worlds — the lightweight advantage of aluminum with the long-wearing durability of steel — making it the preferred choice of factory off-road and enduro race teams worldwide.