SHIMANO Ultegra Chainring FC-R8000 Crank | 39T BCD 110

With their special tooth profiles, mount pins and climbing aids, the Ultegra FC-R8000 chainrings enable a particularly smooth and fast shifting process. They can be used for shifting under load, as you would otherwise only be used to with the rear derailleur. Its construction made of carbon fiber reinforced plastic with aluminum teeth helps to keep the weight low and at the same time to increase the torsional rigidity. The hollow profile of the large chainrings also contributes to this.

NOTE: The letter combinations (MS, MT, MW) behind the number of teeth should match on large and small chainrings. The Ultegra FC-R8000 chainrings have been specially matched to each other thanks to their climbing aids and can only achieve their superior shifting performance in the combinations provided by Shimano.

Technical specifications:

Material: aluminum

Number of teeth (combinability index): 34 (MS), 36 (MT), 39 (MW) teeth

Assembly: inside

bolt circle diameter : 110 mm

Mounting type: 4-hole, asymmetrical

Compatibility: Shimano Ultegra FC-R8000

Circuit: 2x11