Renthal 507U-520-45GPSI UltraLight Grooved Rear Sprocket 520 Pitch 45T Silver

The Renthal 507U-520-45GPSI is a 507 Series UltraLight Grooved rear chainwheel designed for flat track racing applications. Built for Barnes Style quick-change rear hubs, this 45-tooth, 520-pitch sprocket delivers the precise fitment and performance that race teams demand.

Key Features:

• 7075 T6 Aluminum Construction — CNC machined in Manchester, UK from high-strength 7075 T6 aluminum alloy, making it 66% lighter than a comparable steel sprocket
• Grooved UltraLight Design — Computer-engineered material removal maximizes weight reduction while maintaining structural integrity and concentricity
• Advanced Tooth Profile — Precision-machined teeth ensure accurate load dispersion and maximum power transfer from engine to wheel
• Hard Anodized Surface Treatment — An integral hard-anodized finish significantly increases surface hardness and wear resistance for extended chainwheel life
• Quick-Change Compatibility — Designed specifically for Barnes Style rear hubs used in flat track racing for fast gearing changes
• 520 Chain Pitch / 45 Teeth — Silver finish; fits a wide range of flat track competition applications
• Race-Proven — Renthal UltraLight rear sprockets are used on more factory race team machines than all other competing brands combined

The Renthal UltraLight rear chainwheel is the preferred choice of professional flat track competitors seeking the ultimate combination of reduced unsprung rotating mass and long-lasting durability. Sold individually.