Sunstar 420 Works Triplestar Aluminum Rear Sprocket 39T - Black - 5-145739BK

Features:

• Constructed of high quality, aerospace grade 7075 T-6 aluminum
• Computer designed weight reduction holes for lightness
• Exclusive tooth-valley design provides 24% better chain contact area for the best power transfer possible
• Hard anodized coating for added durability and a superb finish
• Works Triplestar Aluminum

Downloads:

• How to read Part Number
• Ratios for Sprocket Combinations
• OEM to Sunstar Cross Reference (Rear)

Ratios for Sprocket Combinations