All details on availability & size recommendation can be found below the specification.
Discover new adventures. Discover freedom.
Incredibly powerful and versatile gravel bike. Built to chase the horizon, explore new routes, or make your daily commute faster and more fun.
Model Description
Two chainrings, endless possibilities. This Topstone, equipped with the new Shimano GRX 400 2x10 drivetrain and a durable SmartForm C2 alloy frame, is made for demanding gravel rides. With generous tire clearance and multiple mounting points for racks and gear, it’s ready for adventurous riders and unpredictable terrain alike.
What It’s For
Gravel riding, exploration, bikepacking, fast commuting
Key Highlights
- Lightweight SmartForm C2 alloy frame with full carbon fork
- Reliable and precise shifting with Shimano GRX 400 2x10 gravel drivetrain
- Powerful and well-modulated Shimano GRX 400 hydraulic disc brakes
- Selle Royal SRX Open saddle with supportive padding and pressure-relief channel for lasting comfort
Specifications
Frameset
| Frame: | Lightweight Topstone SmartForm C2 alloy, flat mount disc, tapered head tube, 12x142 mm thru-axle, StraightShot internal cable routing, mounts for bottles and gear |
|---|---|
| Fork: | Topstone full carbon, 12x100 mm thru-axle, internal cable routing, 1-1/8"–1.5" tapered steerer, 55 mm offset |
| Rear Shock: | – |
Drivetrain & Brakes
| Shift Levers: | Shimano GRX ST-RX400, 2×10-speed |
|---|---|
| Rear Derailleur: | Shimano GRX RD-RX400-GS, Shadow RD+ |
| Front Derailleur: | Shimano GRX FD-RX400-F, braze-on |
| Crankset: | Shimano GRX FC-RX400-2, 46/30 T chainrings |
| Bottom Bracket: | Shimano BB-RS500, sealed |
| Pedals: | Not included (order here) |
| Chain: | Shimano HG54, 10-speed |
| Cassette: | Shimano CS-HG500-10, 11-32 T |
| Brakes: | Shimano GRX BR-RX400, hydraulic disc brakes, 160 mm rotors (f/r) |
| Brake Levers: | Shimano GRX ST-RX400 |
Wheels
| Front Hub: | Shimano HB-TC500, 28 h, 12x100 mm thru-axle |
|---|---|
| Rear Hub: | Shimano FH-TC500, 28 h, 12x142 mm thru-axle |
| Rims: | GXD 1.0, 28 h, tubeless ready |
| Tires: | WTB Riddler TCS Light, 700×37 c, tubeless ready |
Components
| Stem: | Cannondale 3, 6061 alloy, ±7°, 31.8 mm clamp |
|---|---|
| Handlebar: | Cannondale 3, 6061 alloy, 16° flare drop |
| Headset: | Integrated 1-1/8"–1.5" |
| Saddle: | Selle Royal SRX Open |
| Seatpost: | Cannondale 3, 6061 alloy, 27.2×350 mm |
| Extras: | – |
Availability & Size Recommendation
XS
in stock
147 cm
165 cm
147 – 165 cm
SM
December 2025*
160 cm
175 cm
160 – 175 cm
MD
in stock
170 cm
185 cm
170 – 185 cm
LG
approx. 1 week lead time
177 cm
193 cm
177 – 193 cm
XL
approx. 1 week lead time
190 cm
203 cm
190 – 203 cm
*on pre-order
Note: size ranges may overlap — rider preference decides. We’re happy to advise.
| Model year | 2023 |
| Intended use | Gravel |
| Wheel size | 28" |
| Frame material | Aluminum |
| Shifting type | Derailleur |
| Gears | 20 |
