Renthal TwinRing Rear Sprocket 49T Black 520 Chain 1500-520-49GPBK

If you're running a 520 chain on your dirt bike, sprocket wear directly impacts throttle response, acceleration, and chain longevity. The Renthal TwinRing 49T combines a lightweight 7075 T-6 aluminum core with a nickel-coated steel outer ring—delivering three times the lifespan of all-aluminum sprockets while staying lighter than all-steel alternatives. This is the durability advantage serious riders choose when stock sprockets won't cut it.

The dual-material construction isn't just about specs: the outer ring expands and bonds at 200°C, creating a permanent joint that won't separate under aggressive riding. Flat socket head screws provide extra impact resistance, and self-cleaning mud grooves keep dirt from accumulating between teeth—meaning less premature wear and more consistent power delivery.

• Tooth Count: 49T
• Chain Size: 520
• Color: Black
• MPN: 1500-520-49GPBK
• Inner Ring: Ultralight 7075 T-6 aluminum
• Outer Ring: Electro-less nickel steel
• Weight: ~0.5 kg
• Bonding: Permanent thermal expansion
• Self-Cleaning: Mud grooves standard
• Lifespan: 3x standard aluminum sprockets
• Fitment: Yamaha WR250F, WR450F, YZ125, YZ250, YZ450F, and select models
• Installation: Bolt-on replacement