The Cannondale Topstone Carbon 4 is a gravel bike built on a lightweight BallisTec carbon frame with the Kingpin suspension system for added compliance, paired with a Shimano GRX 400 10-speed drivetrain and hydraulic disc brakes. Its endurance-tuned geometry, ample tire clearance, and integrated mounts make it equally suited to fast gravel rides, back-road adventures, and loaded bikepacking trips.

• BallisTec carbon frame with Kingpin rear suspension for up to 30 mm of compliance and flat-mount disc brake mounts

• BallisTec carbon fork with 55 mm OutFront offset, 12×100 mm thru-axle, and internal cable routing

• Shimano GRX 400 10-speed drivetrain (GRX 400 rear derailleur, 11–34 T HG500 cassette) for reliable shifting

• Shimano GRX 400 hydraulic disc brakes with 160 mm RT54 rotors for confident stopping

• WTB ST i23 TCS 700 × 28 h tubeless-ready rims laced to Formula hubs, shod with WTB Riddler Comp 700 × 45 c tires

• clearance for up to 45 mm tires and mounts for full-coverage fenders and multiple bottle/gear cages

• Proportional Response geometry with slack head-tube and stable wheelbase for confident handling on rough terrain

• integrated StashPort storage under the downtube for tools or a CO₂ kit

• SmartSense compatibility for integrated lights and radar