Cervelo Aspero GRX RX825 Di2 1 Gravel Bike Combining the tried and tested gravel-ready Aspero carbon frame and forks with the smooth-shifting of wireless Shimano GRX shifting, the Cervelo Aspero GRX RX825 Di2 1 Gravel Bike delivers uncompromising performance for gravel riding. The frame and geometry are honed to give extra compliance over rough terrain, making the last miles of an epic day all the more comfortable. Tube profiles have also been precisely shaped for smooth streamlining, saving precious energy as you push the pace on gravel rides.  Shimano's 1x setup, featuring a 44-tooth chainring and a wide-range 10-51 tooth cassette, ensures you'll enjoy the perfect pedalling sweetspot for any terrain. The wireless GRX rear derailleur gives rapid gear shifts exactly when you need them, keeping you in just the right gear as trails rise and fall, twist and turn. Shimano's hydraulic brakes are smooth and powerful, encouraging you to push your riding limits, safe in the knowledge you can scrub speed when things turn too gnarly. The inclusion of a 4iiii Power Meter lets you analyse power data with ease, keeping your training and racing on track.