The Cervelo Aspero GRX RX815 Di2 Gravel Bike is built without limits and for someone who's looking to test them. This bike is stiff, classic-racing stiff, and performs like you'd want a road bike to perform off-road. It's designed to take down finish lines, KOMs, PRs, and KFTs with it's pure, unapologetic speed. This bike has a trail front wheel response to rider input which is most critical in high-velocity handling. Flipping the two-position "Trail Mixer" to compensate for the difference in circumference between a 650b and 700c tire maintains consistent handling by maintaining consistent trail figures. This bike is designed to fit most 700c x 42 mm or 650b x 49 mm wheel/tire combinations. Stiffness and handling work together to ensure the bike tracks predictable and responds immediately to critical pedal and bracing inputs. The Cervelo Aspero GRX RX815 Di2 Gravel Bike is a bike that just makes sense.