All
details on Availability & Size Recommendation
can be found below the product specifications.
Explore further. Ride freer.
An amazingly capable, versatile gravel road bike. Built for chasing horizons, exploring routes less travelled or accelerating your commute.
Model Description
Pure gravel goodness. With the smooth-riding SmartForm C2 Alloy frame, the precise shifting of Shimano's upper tier GRX 2x12-speed gravel components, durable WTB rims and tires, and gear mounts galore, the Topstone 1 sets the standard for high performance versatility. Load up and head out.
What it's for
Gravel-riding, exploring, bikepacking, performance commuting
Highlights
- Lightweight SmartForm C2 Alloy frame w/ full carbon fork
- Exceptionally precise and refined shifting from Shimano's upper-tier mechanical GRX 820/600 2x12-speed gravel group
- Superb power and modulation from Shimano's GRX 600/400 hydraulic disc brakes
- Rugged, reliable WTB ST i23 TCS tubeless-ready rims with Riddler 700x37c tires
- Long-distance comfort from Fizik's Aliante Delta saddle
Product Specifications
Chassis
| Frame: | Lightweight Topstone SmartForm C2 aluminum frame, Flat Mount, tapered head tube, 12 x 142mm thru-axle, StraightShot internal cable routing, bottle cage mounts |
|---|---|
| Fork: | Topstone Carbon, 12x100mm thru-axle, internal routing, 1 1/8"–1.5" tapered steerer, 55mm offset |
| Shock: | - |
Drivetrain & Brakes
| Shifters: | Shimano GRX (ST-RX600), 2 x 12-speed |
|---|---|
| Rear derailleur: | Shimano GRX (RD-RX820), Shadow RD+ cage |
| Front derailleur: | Shimano GRX (FD-RX820-F), Braze-on mount |
| Crankset: | Shimano GRX (FC-RX600-2), 46/30T chainrings |
| Bottom bracket: | Shimano GRX (BB-RS500), sealed |
| Pedals: | Not included (order here separately) |
| Chain: | Shimano GRX (CN-M7100), 12-speed |
| Cogs: | Shimano GRX (CS-HG710-12), 12-speed, 11-34T |
| Brakes: | Shimano GRX (BR-RX400), hydraulic disc brakes, 160mm rotors (f/r) |
| Brake levers: | Shimano GRX (ST-RX600) |
Wheels
| Front hub: | Formula, sealed bearings, 28h, 12 x 100mm thru-axle, Centerlock disc mount |
|---|---|
| Rear hub: | Formula, sealed bearings, 28h, 12 x 142mm thru-axle, Centerlock disc mount |
| Rims: | WTB ST i23 TCS, 28h, tubeless-ready |
| Tires: | WTB Riddler TCS Light, 700 x 37c, tubeless-ready |
Components
| Stem: | Cannondale 3, 6061 aluminum, ±7° angle, 31.8mm clamp |
|---|---|
| Handlebar: | Cannondale 3, butted 6061 aluminum, 16° Flare Drop |
| Headset: | Integrated 1 1/8"–1.5" |
| Saddle: | Fizik Aliante Delta, aluminum rails |
| Seatpost: | Cannondale 3, 6061 aluminum, 27.2 x 350mm |
| Others: | - |
Availability & Size Recommendation
XS
December 2025*
147 cm165 cm147–165 cm
S
November 2025*
160 cm175 cm160–175 cm
M
approx. 1 week
170 cm185 cm170–185 cm
L
in stock
177 cm193 cm177–193 cm
XL
approx. 1 week
190 cm203 cm190–203 cm
*for pre-order
Note: size ranges may overlap — in this case, personal preference applies. We’re happy to advise you.
| Model year | 2025 |
| Intended use | Gravel |
| Wheel size | 28" |
| Frame material | Aluminum |
| Shifting type | Derailleur |
| Gears | 24 |
