Shimano FC-R7100 105 12-Speed Outer Chainring

The Shimano FC-R7100 105 12-Speed Outer Chainring is a precise and durable replacement option that restores drivetrain performance with reliable power transfer. It uses Hyperglide+ 12-speed chain interaction as its standout feature, providing firm chain engagement for smooth shifts and steady output under load.

Key Features and Benefits:

• Hyperglide+ 12-speed chain-specific tooth shaping: This profile increases chain contact and stabilises each link during rotation. This benefit reduces drag and prevents unwanted movement. This outcome produces a more efficient transfer of power and steadier cadence under mixed load.
• Matched fit for FC-R7100 cranksets: The ring aligns with the crank arm interface to maintain the intended position of the chain line. This benefit protects shift timing and reduces wear on the drivetrain. This outcome ensures consistent performance and long service life.
• Hardened alloy construction: The ring uses a treated alloy to resist flex and deformation when loaded at high torque. This benefit keeps the teeth stable and secure at all points of the rotation. This outcome improves durability and keeps shift points accurate over time.
• Refined tooth geometry for 12-speed spacing: The layout supports narrower chains without sacrificing grip. This benefit reduces the chance of a dropped chain and supports quiet running. This outcome gives reliable engagement for road, time trial, and triathlon use.
• 110 mm BCD, 4-arm fit: This design integrates with modern Shimano 105 crank patterns for optimal stiffness. This benefit prevents rotational twist under power. This outcome maintains predictable shifts in high-load efforts.
• Genuine Shimano replacement component: Each ring is matched to specific part numbers for exact pairing with its inner chainring. This benefit keeps the system working as designed with controlled interaction between the two rings. This outcome preserves factory performance and reduces the need for further adjustment.

Many riders want a chainring that restores efficiency without altering the feel of their drivetrain. The FC-R7100 addresses this through accurate machining, chain-specific profiling, and a controlled fit that supports clean shifts at 12-speed spacing. Its compatibility and stable geometry allow the drivetrain to run at its intended level without compromise.

Choosing this outer chainring helps maintain the smooth output and firm engagement that define Shimano 105 performance. It is a strong option when replacing a worn or damaged ring and provides the same dependable function as the original part.

Specification: 

• Speed: 12 Speed
• Discipline: Road
• Discipline: Time Trial & Triathlon
• Colour: Black
• Size: 50 or 52  teeth
• Bolt Circle Diameter: 110mm
• Chainring Fitting: 4 Arms
• 50T-NK for 50/34T
• 52T-NH for 52/36T