The Shimano 105 FC-R7100 chainrings are genuine replacements for worn or damaged rings on the 12-speed FC-R7100 crankset. Chainrings wear long before the crank arms do, and a tired outer ring is often behind sloppy front shifts and a chain that won't settle under load. Fitting a fresh ring brings back the crisp, predictable shifting the groupset was designed to deliver.

The tooth profiles are developed to work only with Shimano Hyperglide+ 12-speed chains. That gives closer contact between chain and ring, which means more efficient power transfer and smoother, quieter running.

Rings are sold individually and the inner and outer rings are matched pairings, so the 52T-NH outer runs with the 36T-NH inner (for a 52-36T setup), and the 50T-NK outer runs with the 34T inner (for 50-34T). Check which pairing your chainset uses before ordering, and it's worth replacing both rings at the same time if they've covered similar miles.

Features

• Genuine Shimano replacement chainring for 105 FC-R7100 12-speed cranksets
• Tooth profile developed exclusively for Hyperglide+ 12-speed chains
• Closer chain contact for more efficient power transfer
• 110 mm bolt circle diameter with a four-arm fitting
• Sold individually, in matched pairings: 52T-NH with 36T-NH, 50T-NK with 34T

Specification

• Product type: Chainring
• Speed: 12 speed
• Discipline: Road
• Bolt circle diameter: 110 mm
• Chainring fitting: 4 arms
• Colour: Black
• Compatible chain: Shimano HG 12-speed (Hyperglide+)
• Sizes listed: 36T-NH inner ring and 52T-NH outer ring (for 52-36T)