The Shimano Ultegra FC-R8100 12 Speed Crankset is built with stiffness, weight, and power transfer in mind. Weighing only around 700g it also has an extremely low rotational weight.
The Ultegra FC-R8100 uses HOLLOWGLIDE for smooth shifting and excellent chain retention along with HOLLOWTECH II technology that stiffens the rotating mechanism, making power transfer more effective.
An integral part of Shimano's new 12-speed road lineup, the FC-R8100 crank builds upon Shimano's legendary front shifting and transmission efficiency. With new refinements for seamless 12-speed shifting, the Ultegra crank is now offered in lengths from 160 to 175 mm, bringing performance and improved fit for smaller riders, triathletes, and riders with specific biomechanical requirements.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
Average weight: 711g (52-36T) 700g (50-34T) | |
BB_Pressfit: SM-BB72-41B | |
BB_Threaded: SM-BBR60 | |
BB Shell Width: 70 | |
Compatible chain: CN-M8100 | |
Q-Factor: 148 mm | |
Chainline: 44.5 mm | |
P.C.D.: 110 mm | |
160mm - 50/34 Tooth | Mfg PartNum: IFCR8100MX04 |
160mm - 52/36 Tooth | Mfg PartNum: IFCR8100MX26 |
165mm - 50/34 Tooth | Mfg PartNum: IFCR8100AX04 |
165mm - 52/36 Tooth | Mfg PartNum: IFCR8100AX26 |
170mm - 50/34 Tooth | Mfg PartNum: IFCR8100CX04 |
170mm - 52/36 Tooth | Mfg PartNum: IFCR8100CX26 |
172.5mm - 50/34 Tooth | Mfg PartNum: IFCR8100DX04 |
172.5mm - 52/36 Tooth | Mfg PartNum: IFCR8100DX26 |
175mm - 50/34 Tooth | Mfg PartNum: IFCR8100EX04 |
175mm - 52/36 Tooth | Mfg PartNum: IFCR8100EX26 |
The crankset has a nice finish and a smooth manufactured surface on the cranks and chainrings. This is my first 12 speed product and don't have many miles on the product yet. Installation was easy and once the chain and shifters were calibrated, the crankset operated with little noise and shifted perfectly. I have used Shimano Ultegra on several of my bikes and have had no problems.
reasonably light, solid performance, decent price, all the same features as the top of the line dura-ace product (with only a small weight penalty, but minus the huge extra cost), and in my subjective opinion, a more appealing aesthetic with the matte rather than glossy/polished finish. overall quite satisfied with the purchase, and would buy again and recommend to others!