The new FC-R8100 crank of the ULTEGRA series offers the same fast, precise front shifting performance and the same efficient power transmission that SHIMANO is known for. In addition, it is available in even more length variants than before. With a length between 160 and 175 mm, the ULTEGRA cranks are now also suitable for smaller riders, triathletes and anyone who is interested in shorter crank arms.
As a central component in SHIMANO's new 12-speed road bike line-up, the FC-R8100 crankset is characterized by SHIMANO's typical shifting quality and transmission efficiency. Redesigned for seamless 12-speed shifting, the ULTEGRA crankset is available in lengths from 160 to 175mm. This means more performance and increased customization options for smaller riders, triathletes and riders with special biomechanical needs.

Highlights:
- Optimum power transmission
- Perfect balance between stiffness, stability, weight and rotational efficiency
- HOLLOWGLIDE structure is lighter, yet offers optimized power transfer and faster, more precise shifting up front
- Hollowtech II
- 4-arm crankset
- Redesigned spline profile for wider pitch
- Q factor: 148
- Chainline: 44.5mm
- Bolt circle diameter: 110mm
- Compatible chain: CN-M8100
- Recommended bottom bracket press fit: SM-BB72-41B
- Recommended bottom bracket thread: SM-BBR60
- Weight according to the manufacturer: 700g

(Translated with Google Translate)