All details on Availability & Size Recommendation can be found below the product specifications.
Ready for any route
The Topstone CAAD 1 GRX 2x pairs the new alloy frame of the Topstone family with a Shimano GRX 2x12 drivetrain. Made for riders who like to move fast on pavement and still want plenty in reserve on gravel.
Model Description
At its core is the SmartForm C1 alloy frame with a carbon fork, internal cable routing and lots of mounts for bags, bottles, a rack and fenders. The Shimano GRX groupset with a 46/30 crankset and 11-36 cassette offers a wide gear range: enough top end for fast road sections and easy gears for steep, loose climbs. Hydraulic GRX disc brakes and 45 mm WTB Vulpine tires provide control and comfort when the ground gets rough.
What it’s built for
Gravel rides and mixed-surface tours, bikepacking, training on road and gravel, and commuting
Highlights
- SmartForm C1 alloy frame with Topstone carbon fork, internal cable routing, UDH and plenty of mounts
- Shimano GRX 2x12 drivetrain with 46/30 crankset and 11-36 cassette for a wide gear range
- Shimano GRX hydraulic disc brakes with 160 mm Centerlock rotors
- WTB Vulpine TCS Light 45c tubeless tires on WTB ST i25 rims
Product Specifications
Chassis
| Frame: | Topstone CAAD frame, SmartForm C1 alloy, StraightShot internal cable and dynamo routing, 12x142mm thru-axle, 27.2 dropper post ready, 1.5" headtube (Acros compatible), UDH derailleur hanger, BSA 68mm threaded BB, flat mount disc (160mm), 18mm two-bolt kickstand mount, rack & fender mounts, multiple gear & bottle mounts, suspension-ready geometry |
|---|---|
| Fork: | Topstone carbon, 1-1/8" to 1.5" tapered steerer, 55mm OutFront offset, flat mount disc, internal cable and dynamo routing, 12x100mm thru-axle, triple bottle/gear mounts, fender mounts |
| Shock: | - |
Drivetrain & Brakes
| Shifters: | Shimano GRX 610, 12-speed |
|---|---|
| Rear Derailleur: | Shimano GRX 820, Shadow RD+, 12-speed |
| Front Derailleur: | Shimano GRX 820 |
| Crankset: | Shimano GRX 600, 46/30T, 165mm (47), 170mm (51), 172.5mm (54–56), 175mm (58–61) |
| Bottom Bracket: | Shimano BSA 68 |
| Pedals: | Not included (order here) |
| Chain: | Shimano HG 7100, 12-speed |
| Cassette: | Shimano 105 R7100, 11–36T, 12-speed |
| Brakes: | Shimano GRX 410 hydraulic disc brakes, 160/160mm RT64 Centerlock rotors (f/r) |
| Brake Levers: | Shimano GRX 610 hydraulic disc |
Wheels
| Front Hub: | Shimano TC500, 12x100mm, Centerlock disc mount |
|---|---|
| Rear Hub: | Shimano TC500, 12x142mm, Centerlock disc mount, HG driver |
| Rims: | WTB ST i25 TCS 2.0, 28H, tubeless ready, stainless steel spokes (14g) |
| Tires: | WTB Vulpine TCS Light, 700x45c, tubeless ready |
Components
| Stem: | Cannondale C1 Conceal, alloy, 31.8mm, -6°, 70mm (47–51) / 80mm (54) / 90mm (56–58) / 100mm (61) |
|---|---|
| Handlebar: | Cannondale 3, 6061 alloy, 16° flare, 120mm drop, 400mm (47–51) / 420mm (54–58) / 440mm (61) |
| Headset: | Acros IS52/40 ICR |
| Saddle: | Selle Royal SRX Open, 145mm |
| Seatpost: | Cannondale 3, 6061 alloy, 27.2x350mm |
| Others: | Cannondale KnurlCork bar tape (2.7mm), Conceal stem accessory/computer mount (Garmin/Wahoo/Hammerhead), tubeless valves |
| Model year | 2027 |
| Intended use | Gravel |
| Wheel size | 28" |
| Frame material | Aluminum |
| Shifting type | Derailleur |
| Gears | 24 |
