An amazingly capable, versatile gravel road bike. Built for chasing horizons, exploring routes less travelled or accelerating your commute. The Cannondale Topstone 4 is a capable and versatile alloy gravel bike with big clearance for 45mm tires. Lightweight SmartForm C2 Alloy frame with full carbon fork, microSHIFT Advent X wide range 10-speed group, and powerful disc brakes.