Shimano Ultegra FC-R8100 12spd. Chainring

Upgrade your Shimano Ultegra drivetrain with precision-engineered FC-R8100 12-speed chainrings, designed to deliver crisp shifting, efficient power transfer, and reliable road performance. These genuine Shimano chainrings are perfect for racers, training riders, and enthusiasts who want smooth front shifting and optimal pedal efficiency on 2×12 road setups.

Key Features

• Optimized for Shimano 12-Speed Road Drivetrains: Built to work seamlessly with Shimano 12-speed road groups and HG 12-speed chains.
• Hollowglide Technology: Carbon-reinforced outer ring design keeps weight low while boosting stiffness, delivering quicker and smoother shifts under load.
• Durable Alloy Materials: Lightweight anodized aluminum construction (inner ring) and carbon fiber reinforced plastic outer ring combine durability with performance.
• 4-Bolt 110 BCD Mounting: Compatible with official Shimano cranksets such as FC-R8100 and FC-R8100-P.
• Multiple Sizes Available: Fine-tune your gearing with options like:
  • Shimano Ultegra FC‑R8100 34T 12‑Speed Chainring — lightweight inner ring for climbing terrain
  • Shimano FC‑R8100 36T 12‑Speed Chainring — balanced inner ring choice
  • Shimano FC‑R8100 50T 12‑Speed Chainring — common outer ring for fast group rides
  • Shimano Ultegra FC‑R8100 52/36T 12‑Speed Chainrings — complete 2× ring set for road performance

Why Riders Choose Shimano FC-R8100 Chainrings

Shimano’s FC-R8100 chainrings are engineered for smooth, precise shifting and efficient pedaling power on 12-speed Ultegra cranksets. The advanced tooth profiles and Hollowglide design support reliable engagement with modern 12-speed chains — helping you maintain momentum and minimize missed shifts, whether attacking a climb, sprinting, or cruising on long road rides.

Sizing and Fitment

Shimano FC-R8100 chainrings use a 110 mm bolt circle diameter (BCD) and are compatible with:

• Shimano FC-R8100 cranksets
• Shimano FC-R8100-P cranksets
• Many aftermarket crank arms with 110 BCD (check geometry)

Riders can choose single chainrings or matching inner + outer combinations to tailor gear range for their terrain and riding style.

Perfect For

• Road cyclists seeking smooth 12-speed front shifting
• Riders upgrading worn or damaged chainrings
• Cyclists tuning gear ratios for climbing, sprinting, or endurance
• Shimano Ultegra FC-R8100 crank owners needing genuine replacement components

What’s Included

Each listing includes:

• One genuine Shimano FC-R8100 chainring (size selected)
• Compatible with Shimano 12-speed HG chains

Pro Tip: When installing new chainrings, pair them with a fresh chain and regularly check for wear to maintain the cleanest shifting performance.