When developing the Ultegra R8100 series, Shimano took a holistic and 100% performance-oriented approach, because great speed means great responsibility. Faster than ever before, the 12-speed road bike groupset always scores with unparalleled check and comfort - whether in an amateur race, on the hunt for a personal best time or on a companionable ride.
As with the Dura Ace R9200, not only does Hyperglide+ find its way into the Ultegra's components, but its Di2 components also rely on wireless technology to further simplify operation and ensure smooth shifting.
As the central element of the 12-speed Ultegra R8100 drive unit, the FC-R8100 crankset is characterized by the shifting quality and transmission efficiency typical of Shimano. Not only the chainrings, which have a hollowglide hollow construction, but also the lightweight crankarms manufactured using Hollowtech II technology contribute to optimized power transmission and faster and more precise shifting.
All in all, this results in a perfect balance between stiffness, stability, low weight and rotational efficiency. Numerous crank arm lengths and gradations with 50-34 or 52-36 teeth also offer variability and an optimum gear ratio for almost any riding situation.
The leitmotif of Shimano's Hollowtech II technology is the perfect balance between stiffness, stability, weight and rotational efficiency.
The aim was to produce a crank that minimizes the effort required for the drive unit and enables more efficient power transmission. An exclusive forging process enables the production of extremely light crankarms that still guarantee maximum stiffness. The fixed connection of the right arm to the axle of the bottom bracket and its external bearing also serve to achieve an optimum ratio between stiffness and low weight.
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Note: The item is supplied without original packaging!
Scope of delivery: Crankset (without bottom bracket)
| Product name: | Shimano Ultegra FC-R8100 Crankset - 2x12-speed - 172,5 mm | 52-36 - Special Offer |
| Manufacturer: | Shimano Parts |
| Item code: | SHI747819 |
| Activity: | Cycling |
| Material: | Aluminium |
| Usage bikesport: | Road Bike |
| Crank arm length: | 172.5 |
| Number of gears - front: | 2 |
| Number of gears - rear: | 12 |
| Bottom bracket axle profile: | 24mm Hollow Shaft |
| Bottom bracket case width: | 68mm, 70mm |
| Chainring version: | round |
| Chainring mount: | conventional |
| Chain line: | 44.5mm |
| Q-factor: | 148mm |
| Model year: | 2025 |
| Collection: | Full year |
| Weight: | 711g |
| Weight source: | Manufacturer |
| Product series: | Shimano - Ultegra |
| Bolt circle diameter: | 110 |
| Number of teeth: | 36, 52 |
| Manufacturer page: | http://www.shimano-europe.com/ |
