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The SHIMANO 105 FC-R7100 50-tooth outer chainring (official Shimano part number Y0RS98010) is a genuine replacement part engineered for 12-speed Shimano 105 Di2 and mechanical road cranksets. Constructed from anodized aluminum with a rigid, hollowed profile design, it delivers exceptional torsional stiffness for maximum power transfer while keeping weight low. Featuring precision-engineered shift ramps and Tooth profiles (HOLLOWGLIDE and HG technologies), it ensures crisp, fast, and silent front derailleur shifts even under heavy pedaling loads. This chainring is specifically optimized to pair with the 34-tooth inner ring from the same series to create the standard compact 50/34T gearing combination.
Key Specifications & Compatibility
Product Type: Outer chainring for road cranksets.
Official SHIMANO Reference: Y0RS98010.
Tooth Count: 50 Teeth (50T).
Bolt Circle Diameter (BCD): 110 mm, 4-bolt asymmetrical pattern.
Crankset Compatibility: SHIMANO 105 FC-R7100 (12-Speed). Compatible with FC-RS520.
Drivetrain Compatibility: SHIMANO 12-Speed Road (Di2 and Mechanical).
Chain Compatibility: SHIMANO HG 12-Speed (e.g., CN-M7100, CN-M8100, CN-M9100).
Material: Anodized high-grade aluminum.
Recommended Pairing: 50-34T (designed for use with the 34T inner chainring ref. Y0RS34000).
Weight: ~145 g.
Kit Contents: Single 50T outer chainring (chainring bolts not included).
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