About the Topstone 1 Gravel BikeAn amazingly capable, versatile gravel road bike. Built for chasing horizons, exploring routes less travelled or accelerating your commute.Where it thrives - Gravel roads, out in the elementsWhat it's built for - Traction, handling, comfortKey FeaturesLightweight SmartForm C2 Alloy frame w/ full carbon forkShimano GRX 800/600 11-speed shiftingWTB ST i23 TCS rimsSpecificationsFramesetFrame: Lightweight SmartForm C2 Alloy, 12x142 thru-axle, tapered headtube, BSA threaded BBm flat mount disc, StraightShot internal cable routing, multiple gear/bottle mountsFork: Topstone Carbon, 1-1/8 to 1.5 steerer, 55mm OutFront offset, flat mount disc, internal routing, 12x100 thru-axle, fender/gear mountsWheels Wheelset: WTB ST i23 TCS, 28h, tubeless readyTyres: Vittoria Terreno Dry, 700x35c, tubeless readyDrivetrainPedals: Not IncludedFront Derailleur: Shimano GRX 800, braze-onRear Derailleur: Shimano GRX 810, Shadow RD+Shifters: Shimano GRX 600, 11-speedChain: KMC X11, 11-speedCrankset: FSA Gossamer Pro Modular AGX+, 46/30Rear Cogs: Shimano 105, 11-34, 11-speedBottom Bracket: FSA BB386 MegaEvoComponentsHandlebar: Cannondale 3, butted 6061 Alloy, 16 deg flare dropStem: Cannondale 3, 6061 Alloy, 31.8, 7°Brakes: Shimano GRX 400 hydraulic disc, 160/160mm RT54 rotorsBrake Levers: Shimano GRX 600 hydraulic discSaddle: Fizik Aliante Delta, S-alloy railsSeatpost: Cannondale 3, 6061 Alloy, 27.2x350mmBike SizingChoosing the bike size depends on the type of bike, your height, your riding style, and your preference. A correct fitting bike will be more comfortable, more efficient and more fun to ride. This bike size guide gives our customers general advice on choosing the right size. XSSMLXLRider Height147cm - 165cm160cm - 175cm170cm - 185cm177cm - 193cm 182cm - 203cm