Explore further. Ride freer. An amazingly capable, versatile gravel road bike. Built for chasing horizons, exploring routes less travelled or accelerating your commute. Pure gravel goodness. With the smooth-riding SmartForm C2 Alloy frame, the precise shifting of Shimano's upper tier GRX 2x12-speed gravel components, durable WTB rims and tires, and gear mounts galore, the Topstone 1 sets the standard for high performance versatility. Load up and head out. Highlights Lightweight SmartForm C2 Alloy frame w/ full carbon fork Exceptionally precise and refined shifting from Shimano's upper-tier mechanical GRX 820/600 2x12-speed gravel group Superb power and modulation from Shimano's GRX 600/400 hydraulic disc brakes Rugged, reliable, WTB ST i23 TCS tubeless ready rims with Riddler 700x37c tires Long distance comfort from Fizik's Aliante Delta saddle