Cannondale
Topstone Carbon 2 GRX - 2x Obsidian
The Swiss Army knife of gravel bikes. Shimano’s GRX820 drivetrain handles everything from weekend escapes to race-day sprints. KingPin suspension keeps you grounded and comfortable, even when the terrain is anything but.
Cannondale
Always Game
Our take on the ultimate all-round gravel bike. Go anywhere, bring everything and then keep on going.
What it's for
Gravel riding & racing, bikepacking, going hard and long on dirt or pavement
Always Game
Smiles for Miles
Kingpin is our lightweight, go-for-longer rear suspension. Maintenance-free and complexity-free, it gives the Topstone frame legit rear-wheel travel without compromising stiffness for the sprint. Kingpin provides a smoother ride, more traction to push harder, and more give to take on the rough stuff. You’ll hardly know it’s there, but you’ll be very glad you’ve got it.
Bring It All
Dropper Ready
Built to accept an internally-routed 27.2mm dropper seatpost, which shouldn´t be a surprise on a bike this capable.
Proportional Response
Tuned for the rider, our size-specific construction creates optimal stiffness and compliance for each frame size. So, every rider benefits from the ideal ride feel and comfort of KingPin.
OutFront Steering Geometry
Confident stability meets nimble agility. An extra long fork offset paired with a slack head angle keeps the steering light and lively, yet delivers unreal confidence at speed and in the rough stuff.
Tidy does it
Internal cable routing throughout the frame, combined with Conceal Stem, delivers a tidy, integrated look.
KingPin
Our innovative gravel rear suspension is light, simple, and effective. A thru-axle pivot in the seat tube allows the rear triangle and seatpost of the bike to flex vertically, delivering up to 30mm of bump-smoothing travel.
StashPort + StashBag
StashPort is our take on a downtube storage system, accessed beneath the water bottle cage. Every bike includes StashBag, a specially designed bag for your essentials.
Highlights
Build highlights
Specification
Topstone Carbon 2 GRX - 2x Obsidian specification
Specification as supplied by Cannondale. Components may change subject to availability.
Frameset
- Model Code
- C15155U
- Frame
- Topstone Carbon, Kingpin suspension system, Proportional Response construction, downtube Stashport, internal cable routing, 12x142mm thru-axle, 27.2 dropper post ready, UDH, BSA 68mm threaded BB, flat mount disc, removable fender bridge, multiple gear/bottle mounts
- Fork
- Topstone Carbon, 1-1/8" to 1.5" steerer, 55mm OutFront offset, flat mount disc, internal routing, 12x100 thru-axle, triple bottle/gear mounts, fender mounts
- Headset
- Acros IS52/40 ICR
Drivetrain
- Rear Derailleur
- Shimano GRX 820, Shadow RD+
- Front Derailleur
- Shimano GRX 820
- Shifters
- Shimano GRX 820, 12-speed
- Chain
- Shimano M8100, 12-speed
- Crank
- Shimano GRX 820, 48/31
- Rear Cogs
- Shimano Ultegra R8100, 11-34, 12-speed
- Bottom Bracket
- Shimano BSA 68
Brakes
- Brakes
- Shimano GRX 820 hydraulic disc, 160/160mm MT800 rotors
- Brake Levers
- Shimano GRX 820 hydraulic disc
Wheels & tyres
- Front Hub
- Shimano TC500, 12x100mm centerlock
- Rear Hub
- Shimano TC500, 12x142mm centerlock
- Rims
- WTB KOM Team i25 TCS, 28h, tubeless ready
- Spokes
- Stainless Steel, 14g
- Tire Size
- 37
- Wheel Size
- 700c
- Tires
- WTB Riddler TCS Light, 700x45c, tubeless ready
- Front Tire
- WTB Riddler TCS Light, 700x45c, tubeless ready
- Rear Tire
- WTB Riddler TCS Light, 700x45c, tubeless ready
- Wheel Sensor
- Cannondale Wheel Sensor
Cockpit & contact points
- Handlebar
- Cannondale 2 ShortDrop, 7050 alloy, 12 deg flare drop
- Stem
- Cannondale C1 Conceal, Alloy, 31.8, -6°
- Grips
- Cannondale KnurlCork, 2.7mm
- Saddle
- Fizik Terra Argo X7
- Seatpost
- Cannondale 2 Carbon, 27.2x350mm (47-58), 400mm (61)
Extras
- Extra 1
- Large StashBag downtube storage bag, tubeless valve stems
Ordering
Available from The Cycle Collective
Available to order through The Cycle Collective in Dorking. For availability, sizing advice or a bike fit, call 0203 148 6764 or email hello@thecyclecollective.cc.