Renthal TwinRing 49-Tooth Rear Sprocket Blue 1500-520-49GPBU

Sprocket wear directly impacts chain life and power delivery—a worn or poorly designed sprocket forces your chain to work harder and fail faster. The Renthal TwinRing 49-Tooth Rear Sprocket eliminates this problem with a hybrid aluminum-steel construction that outlasts standard alternatives by three times while shedding unnecessary weight. If you're serious about off-road performance and want a sprocket that handles mud, dirt, and constant stress without compromise, this is the upgrade that pays for itself in extended component life.

The dual-material design pairs a high-strength Ultralight™ 7075 T-6 aluminum inner ring with an electro-less nickel-coated steel outer ring. This combination gives you the strength-to-weight ratio you need for aggressive riding without the bulk of an all-steel sprocket. The outer ring is thermally expanded and permanently bonded to the inner ring at 200°C—a process that creates a connection lasting the sprocket's entire service life with zero risk of separation.

Self-cleaning mud grooves run between each tooth, actively pushing dirt and debris away during rotation. This design detail significantly reduces wear and keeps your sprocket performing at peak efficiency in conditions where standard sprockets accumulate buildup and degrade rapidly. Flat socket head screws provide additional strength during chain impacts and eliminate contact points with chain guides, further extending durability.

• Tooth Count: 49
• Chain Size: 520
• Color: Blue
• Weight: 1.70 lbs
• Inner Ring: Ultralight™ 7075 T-6 aluminum
• Outer Ring: Electro-less nickel-coated steel
• Bonding Method: Thermal expansion
• Installation: Bolt-on
• Part Number: 1500-520-49GPBU