Shimano 105 FC-R7100 12 Speed Chainring - 50T
Replace, upgrade, or mix — 12-speed chainrings built for 105 performance.
The Shimano 105 FC-R7100 chainrings are sold individually so you can replace a worn ring, swap your gearing configuration, or pair them with an FC-R7100 Crank Arm Assembly for a custom build. Available in four sizes across two double-chainring setups — 50/34T compact and 52/36T semi-compact — all sharing the same 110mm BCD, 4-bolt spider pattern. Cold-forged aluminium construction, Shimano's 12-speed chain profiling, and full compatibility with both R7100 mechanical and R7150 Di2 drivetrains.
12-speed only. These chainrings are engineered for Shimano 12-speed chains and FC-R7100 / FC-R7150 arm assemblies. They are not compatible with FC-R7000 (11-speed) spiders or other BCD patterns. If you are unsure of your current setup, check the spider markings or contact us before ordering.
What makes this worth it
Cold-Forged Aluminium
Precision cold-forged construction for consistent tooth profile and long chain life — the same material and process used across Shimano's performance road chainring range.
Two Gearing Configurations
50/34T compact suits climbing-focused and endurance riding. 52/36T semi-compact delivers a taller top gear for fast terrain and racing. Both use the same 110mm BCD arms.
12-Speed Chain Profiling
Tooth geometry engineered specifically for Shimano's 12-speed chain. Shift ramps and pin positions are optimised for the narrower chain profile — not interchangeable with 11-speed.
Mechanical & Di2 Compatible
Fits both the FC-R7100 mechanical and FC-R7150 Di2 arm assemblies. One chainring platform across both drivetrain versions — no separate part numbers for electronic shifting.
Sold Individually
Replace a worn outer without touching the inner, or switch configurations entirely. Buying individually means you only pay for exactly what you need.
Standard 110mm BCD
4-bolt, 110mm bolt circle diameter — the current Shimano 12-speed road standard. Fits genuine Shimano FC-R7100 and FC-R7150 arms. Not compatible with FC-R7000 (11-speed) spiders.
Specifications
| Brand | Shimano |
| Series | 105 (FC-R7100) |
| Speed | 12-speed |
| Available Sizes | 50T outer, 34T inner (compact) / 52T outer, 36T inner (semi-compact) |
| BCD | 110mm (4-bolt) |
| Chain Compatibility | Shimano 12-speed (CN-HG601 and equivalent) |
| Material | Aluminium alloy (cold-forged) |
| Compatible Arms | FC-R7100 (mechanical), FC-R7150 (Di2) |
| Not Compatible With | FC-R7000 (11-speed), other BCD patterns |
| Sold As | Individual ring (not a pair) |
| Groupset | Shimano 105 R7100 / R7150 Di2 |
(IFCR7100RING)
Cold-Forged Aluminium
Precision cold-forged construction for consistent tooth profile and long chain life — the same material and process used across Shimano's performance road chainring range.
Two Gearing Configurations
50/34T compact suits climbing-focused and endurance riding. 52/36T semi-compact delivers a taller top gear for fast terrain and racing. Both use the same 110mm BCD arms.
12-Speed Chain Profiling
Tooth geometry engineered specifically for Shimano's 12-speed chain. Shift ramps and pin positions are optimised for the narrower chain profile — not interchangeable with 11-speed.
Mechanical & Di2 Compatible
Fits both the FC-R7100 mechanical and FC-R7150 Di2 arm assemblies. One chainring platform across both drivetrain versions — no separate part numbers for electronic shifting.
Sold Individually
Replace a worn outer without touching the inner, or switch configurations entirely. Buying individually means you only pay for exactly what you need.
Standard 110mm BCD
4-bolt, 110mm bolt circle diameter — the current Shimano 12-speed road standard. Fits genuine Shimano FC-R7100 and FC-R7150 arms. Not compatible with FC-R7000 (11-speed) spiders.
| Brand | Shimano |
| Series | 105 (FC-R7100) |
| Speed | 12-speed |
| Available Sizes | 50T outer, 34T inner (compact) / 52T outer, 36T inner (semi-compact) |
| BCD | 110mm (4-bolt) |
| Chain Compatibility | Shimano 12-speed (CN-HG601 and equivalent) |
| Material | Aluminium alloy (cold-forged) |
| Compatible Arms | FC-R7100 (mechanical), FC-R7150 (Di2) |
| Not Compatible With | FC-R7000 (11-speed), other BCD patterns |
| Sold As | Individual ring (not a pair) |
| Groupset | Shimano 105 R7100 / R7150 Di2 |
| SKU | IFCR7100RING |
| Brand | Shimano |
