Cannondale Topstone Crb 4 2021 Gravel Nothing is impassableThe best gravel bike for anything from dirt roads to singletrack trails. With the grip and comfort of the Kingpin suspension, nothing is off-limits.Where it thrivesGravel and Dirt Roads, Rough Pavement, TrailsWhat it's built forGravel riding, back road exploring, bike packing and off-road adventuresHighlightsLightweight Topstone Carbon frameset with Kingpin suspension, SmartSense compatible / Integrated Cannondale App connectivityShimano GRX 600/400 10-speed gravel groupWTB ST i23 TCS rims / 700x45c WTB Riddler Comp tiresKingpin SuspensionDelivering a smooth ride without the added weight and complexity of a shock and links, Kingpin is our answer for the most demanding gravel riders. Whether you need more comfort to go long, more traction to push beyond or more give to take on the tech - Kingpin is the maintenance-free, lightweight answer to your prayers.SpecificationFrame: Cannondale BallisTec Carbon Frame, Kingpin suspension system, 12x142 Speed Release thru-axle, dropper post compatible, direct line cable routingFork: Cannondale BallisTec Full Carbon, 1-1/8" to 1.5" steerer, 55mm OutFront offset, flat mount disc, internal routing, 12x100 Speed Release thru-axleHeadset: Integrated, 1-1/8" - 1.5"Bottom Bracket: Cannondale BB30Stem: Cannondale 2, 6061 Alloy, 31.8, 7°Handlebar: Cannondale 3, butted 6061 alloy, 16 deg flare dropBar Tape: Cannondale Bar Tape, 3.5mmFront Brake: Shimano GRX 800 hydraulic disc, 160mm RT70 rotorRear Brake: Shimano GRX 800 hydraulic disc, 160mm RT70 rotorBrake Levers: Shimano GRX 800 hydraulic discFront Derailleur: Shimano GRX 800, braze-onRear Derailleur: Shimano GRX 810, Shadow RD Shift Levers: Shimano GRX 800, 11-speedChain: Shimano HG601, 11-speedCassette: Shimano 105, 11-34, 11-speedCrankset: Cannondale, BB30a, OPI SpideRing, 46/30tFront Wheel: WTB KOM Light i23 TCS, 28-hole, tubeless-ready rim | Formula cartridge bearing, Center Lock, 12x100mm hub | stainless steel, 14-gram spokesRear Wheel: WTB KOM Light i23 TCS, 28-hole, tubeless-ready rim | Formula cartridge bearing, Center Lock, 12x142mm hub | stainless steel, 14-gram spokesFront Tyre: WTB Riddler TCS Light, 700 x 37c, tubeless-ready clincherRear Tyre: WTB Riddler TCS Light, 700 x 37c, tubeless-ready clincherSaddle: Fabric Scoop Shallow Elite, cro-mo railsSeatpost: Cannondale 2, UD Carbon, 27.2 x 350mmPedals: Available to be purchased separatelyAccessories: Cannondale Wheel Sensor, Removable mudguard bridge