The new Shimano Ultegra R8000 chainset offers an ideal balance of light weight and stiffness, making it the perfect choice for both enthusiast and competitive riders.The HollowGlide hollow outer chain ring gives vast improvements in rigidity by virtually removing outer chainring flex and hugely improves shift performance, and with HollowTech II cold forged 4 arm hollow cranks, this chainset saves weight whilst making sure that none of your effort is lost when you're putting the power down.The Hollowtech II integrated bottom bracket design uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency, and the bottom bracket seal design features a minimal bearing interface to offer incredibly smooth rolling and increased durability. The wide gear pitch spacing increases clearance between chain and leading teeth to provide compatibility to frames with O.L.D. 135/142 mm and 410mm chain stay length.With a wide range of chainring options and crank lengths the