Shimano 105 FC-R7100 12 Speed Crankset 50/34T - 165mm
The crankset that makes 12-speed performance accessible to every road rider.
The Shimano 105 FC-R7100 brings the same hollow aluminium arm technology and 12-speed HG+ chainring profiles found in the Dura-Ace and Ultegra tiers down to a price point that makes sense for dedicated road riders. The freshly redesigned arms are formed with an internal hollow structure that strips weight without compromising the stiffness you notice every time you accelerate out of a corner or grind up a long climb. This is not a compromise crankset — it is a precision component priced for the real world.
One crankset. Both drivetrains. The FC-R7100 is compatible with the full 105 R7100 platform — run it with the cable-actuated mechanical groupset or the R7150 Di2 electronic shifting system. If you upgrade to Di2 later, your crank stays exactly where it is.
What makes this worth it
Hollow Aluminium Arms
Shimano's hollow arm construction removes material from the inside out, delivering a crankset that is measurably lighter without sacrificing the stiffness you need when you put power down.
12-Speed Optimised Chainrings
The asymmetric 4-arm 110mm BCD spider and HG+ chainring tooth profiles are designed specifically for 12-speed drivetrains, delivering precise, rattle-free shifting under load.
Mechanical & Di2 Compatible
One crankset works across the entire 105 R7100 platform. Run it today with the cable-actuated groupset and upgrade to Di2 later — the crank stays exactly where it is.
Two Chainring Options
50/34T compact suits all-round road riding and climbing. 52/36T mid-compact suits faster terrain and race-day efforts. Both configurations use the same arm assembly.
Five Arm Lengths
Available in 160, 165, 170, 172.5 and 175mm. Whether you are fitting a smaller rider or dialling in a triathlon position, the right length is in the range.
Gloss Black Anodized Finish
Hard anodizing protects the aluminium from corrosion and wear while giving the crankset a deep, clean black look that holds up season after season.
Specifications
| Brand | Shimano |
| Series | 105 R7100 |
| Speed | 12-speed |
| Chainring Options | 50/34T (compact), 52/36T (mid-compact) |
| Crank Arm Lengths | 160, 165, 170, 172.5, 175mm |
| Q-Factor | 145.0mm |
| Chainline | 43.5mm |
| BCD | 110mm (asymmetric 4-arm) |
| Weight | approx. 695g (170mm, 50/34T) |
| Bottom Bracket Interface | Hollowtech II (24mm spindle) |
| Compatible Bottom Brackets | SM-BBR60 (BSA threaded), SM-BB72-41B (BB86 pressfit) |
| Arm Material | Hollow Aluminium |
| Finish | Gloss Black Anodized |
| Groupset Compatibility | Shimano 105 R7100 (mechanical), 105 R7150 (Di2) |
(IFCR7100CRANK)
Hollow Aluminium Arms
Shimano's hollow arm construction removes material from the inside out, delivering a crankset that is measurably lighter without sacrificing the stiffness you need when you put power down.
12-Speed Optimised Chainrings
The asymmetric 4-arm 110mm BCD spider and HG+ chainring tooth profiles are designed specifically for 12-speed drivetrains, delivering precise, rattle-free shifting under load.
Mechanical & Di2 Compatible
One crankset works across the entire 105 R7100 platform. Run it today with the cable-actuated groupset and upgrade to Di2 later — the crank stays exactly where it is.
Two Chainring Options
50/34T compact suits all-round road riding and climbing. 52/36T mid-compact suits faster terrain and race-day efforts. Both configurations use the same arm assembly.
Five Arm Lengths
Available in 160, 165, 170, 172.5 and 175mm. Whether you are fitting a smaller rider or dialling in a triathlon position, the right length is in the range.
Gloss Black Anodized Finish
Hard anodizing protects the aluminium from corrosion and wear while giving the crankset a deep, clean black look that holds up season after season.
| Brand | Shimano |
| Series | 105 R7100 |
| Speed | 12-speed |
| Chainring Options | 50/34T (compact), 52/36T (mid-compact) |
| Crank Arm Lengths | 160, 165, 170, 172.5, 175mm |
| Q-Factor | 145.0mm |
| Chainline | 43.5mm |
| BCD | 110mm (asymmetric 4-arm) |
| Weight | approx. 695g (170mm, 50/34T) |
| Bottom Bracket Interface | Hollowtech II (24mm spindle) |
| Compatible Bottom Brackets | SM-BBR60 (BSA threaded), SM-BB72-41B (BB86 pressfit) |
| Arm Material | Hollow Aluminium |
| Finish | Gloss Black Anodized |
| Groupset Compatibility | Shimano 105 R7100 (mechanical), 105 R7150 (Di2) |
| SKU | IFCR7100CRANK |
| Brand | Shimano |
