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Save 20% on Ultegra FC-R8000 Crankset
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Expert reviews
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Simon Withers
The Shimano Ultegra R8000 Crankset is a reliable and smooth-shifting chainset that offers a wide range of gearing options for different riding styles and terrains. It has a sleek and refined design that matches the rest of the Ultegra groupset, and it features Shimano's Hollowtech II technology for reduced weight and increased stiffness. The chainrings are made of durable aluminum and have a special coating to improve wear resistance and reduce friction. The crankset is compatible with 11-speed chains and bottom brackets, and it comes in various lengths and chainring combinations.
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Description
Shimano's Ultegra FC-R8000 Crankset represents true trickle down from Shimano's flagship Dura-Ace group not only visually, but in the technological features that make both cranksets light, stiff, and shift with precision. The new, aggressively angular lines increase stiffness, providing excellent power transfer. The chainrings and bolts were also redesigned to provide better chainstay clearance for shorter rear end bikes or road disc bikes with wider dropout spacing. Shimano has the technical expertise and manufacturing prowess to create industry-leading shifting and stiffness to weight for the rings and crank arms, respectively. The latter property is owed to Shimano's Hollowtech II arm construction, a heavily guarded secret. Where other manufacturers drill the arms to reduce weight or create two sides and clam-shell them together, Shimano is able to forge the arms and still keep them hollow. As with the Dura-Ace 9100 series, Shimano adds some width to the R8000's arms and orients the spider to more efficiently transfer energy during important power phases throughout the pedal stroke. The asymmetric spider and chainring spacing allows Shimano to put two chainring bolts close to the wider arms, further adding rigidity to the rings for better shifting and power transfer. As noted above, Shimano's excellent chainring engineering continues with the FC-R8000. We once heard a rumor that Shimano owns patents on every single chainring tooth's shape, pin, shift ramp, etc. We're not sure if this is true, but we do know that, compared to other rings we've used, Shimano rings in operation tend to run much quieter, wear at a much better rate, and offer more positive and quicker shifting. The tooth profiles on this crank have been slightly altered to improve shifting and chain retention at the extreme chainlines seen on the shorter stays of newer bikes combined with larger cassette ranges and wider rear spacing. To lessen the chainline, the inner chainring has been brought...
Specifications
| Crank Length | 172.5 Mm |
| Warranty | 1 Year |
| Brand | Shimano |
| Quantity | 2 |
| Chainring Sizes | 50/34t |
| Number Of Chainrings | 2 Chainrings |
| Q Factor | 146 |
| Bottom Bracket Compatibility | Outboard 68/70mm |
| Weight | 674 Grams |
| Material(s) | Aluminum/steel |
| Chainring Mount | 4-bolt Asymmetric |
| Bolt Circle Diameter | 110 Millimeters |
| Best Use | Road Cycling |
| Crank Arm Material | Aluminum |
| Number Of Speeds | 11-speed |
| Chainline | 43.5 |
| Included Components | Chainring |
| Spindle Diameter | 24 Millimeters |