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 | ✔ |
