Shimano CX50 Double 10 Speed Chainset - The HollowTech II 10-speed CX50 cyclo-cross chainset is the perfect choice for enthusiast riders - Alloy chainrings are both rigid and lightweight - The chainring teeth have been developed to work in conjunction with the 10-speed directional HG road chains for increased contact to provide greater efficiency and improved power transfer - Industry leading cold forged crank arms have been evolved to increase rigidity, reduce weight and improve strength - 2-piece cap-free design is quick and easy to install whilst being lighter and stiffer than a traditional crank / bottom bracket assembly - Integrated bottom bracket seal design has minimal bearing interface ensuring smooth rolling and increased durability - 46/ 36T chainrings using 110 mm bolt circle diameter

Shimano CX70 Double 10 spd Chainset The HollowTech II 10-speed CX70 cyclo-cross chainset offers an ideal balance of light weight and stiffness, making it the perfect choice for both enthusiast and competitive cyclo-cross riders. - Machined alloy outer chainring is both rigidity and lightweight - Industry leading HollowTech II cold forged hollow crank arms have been evolved to increase rigidity, reduce weight and improve strength - A wide range of crank arm lengths are available to meet the needs of all riders - HollowTech II integrated bottom bracket uses a wider bearing placement and larger axle diametre for increased stiffness and efficiency - HollowTech II integrated bottom bracket seal design has minimal bearing interface ensuring smooth rolling and increased durability - 46/36T chainrings using 110mm bolt circle diametre The chainring teeth have been developed to work in conjunction with the CN7901 and CN6701 10-speed directional HG chains for increased contact to provide greater efficiency and improved power transfer.