| MODEL NO | FC-R7100 |
|---|---|
| SERIES | SHIMANO 105 R7100 Di2 Series |
| Color | Black |
| Rear speeds | 12 |
| Compatible chain | HG 12-speed |
|---|---|
| Chain line (mm) | 44.5 |
| P.C.D. (mm) | 110 |
| Spider/Gear arms | 4 |
| Chainring combination | 50-34T 52-36T |
| Q-factor (mm) | 148 |
| Crank arm length (mm)|160 | ✔ |
| Crank arm length (mm)|165 | ✔ |
| Crank arm length (mm)|170 | ✔ |
| Crank arm length (mm)|172.5 | ✔ |
| Crank arm length (mm)|175 | ✔ |
| Optional chain guard|Without chain/bash guard | ✔ |
| HOLLOWTECH II | ✔ |
| HOLLOWTECH crank arm | ✔ |
| Compatible bottom bracket type|Outboard | ✔ |
| Recommended bottom bracket|Threaded (normal) | SM-BBR60 |
| Recommended bottom bracket|Press-fit | SM-BB72-41B |
| Threaded bottom bracket shell width (mm)|68 | ✔ |
| Threaded bottom bracket shell width (mm)|70 | ✔ |
| Crank fixing screw included | ✔ |