Product description
An integral part of Shimano's new 12s road line, the FC8100 crankset is based on the legendary efficiency of Shimano chainring and drivetrains. With new refinements to a smooth 12-speed shifter, the ULTEGRA crankset is now offered in lengths from 160 to 175mm and offers more performance and compatibility for smaller riders, triathletes and riders with specific biomechanical requirements.
- ・Optimal balance of stiffness, strength, weight and rotational efficiency.
- ・HOLLOWGLIDE structure reduces weight but maintains strength, for better power transfer and faster, more precise chainring shifting
- ・52-36 and 50-34 chainring combinations. Crank lengths 160, 165, 170, 172.5, and 175 mm.
PRODUCT SPECIFICATIONS
| MODEL NO |
FC-R8100 |
| SERIES |
ULTEGRA R8100 Series |
| Color |
Color series |
| Medium weight |
700 (50-34T) 711 (52-36T) |
| Sprockets |
12 |
| Compatible chain |
12-speed HG |
| Chainline (mm) |
44.5 |
| Bolt size (mm) |
110 |
| Spiders/Arms |
4 |
| Crown combination |
50-34D 52-36D |
| Q-factor (mm) |
148 |
| Crank length (mm)|160 |
✔ |
| Crank length (mm)|165 |
✔ |
| Crank length (mm)|170 |
✔ |
| Crank length (mm)|172.5 |
✔ |
| Crank length (mm)|175 |
✔ |
| Optional chainring|Without chain / bumper |
✔ |
| HOLLOWTECH II |
✔ |
| HOLLOWTECH crank |
✔ |
| HOLLOWGLIDE |
✔ |
| Compatible Bottom Bracket Type|External |
✔ |
| Recommended Bottom Bracket|Threaded (Regular) |
SM-BBR60 |
| Recommended Bottom Bracket|Press until seated |
SM-BB72-41B |
| Threaded bottom bracket body length (mm)|68 |
✔ |
| Threaded bottom bracket body length (mm)|70 |
✔ |
| Crank fixing screw included |
✔ |
