Why buy your bike from Sigma Sports?
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
All our bikes are fully built by our Cytech qualified mechanics. To find out more, see the Built, Checked, Tuned and Tested section below to see how we'll deliver your bike.
We offer FREE DELIVERY of your bike to your home or place of work. Once you've placed your order, our Customer Care team will be in contact to offer a convenient delivery date of your choice.
We've partnered with Pedalsure to offer you 30-DAYS FREE bike insurance on new bikes over £400. Visit our Cycle Insurance page to learn more and claim.
Cannondale Topstone 2 Gravel Bike 2023
The highly capable Cannondale Topstone 2 Gravel Bike delivers comfort, traction and great handling on mixed terrain. Adventure-ready thanks to a range of mounts and clearance for tyres up to 45mm wide, load it up for long days and bikepacking trips, or keep it light for faster rides.
The SmartForm C2 alloy frame is highly durable and a carbon fork improves handling and keeps weight down. OutFront steering geometry makes the bike stable yet agile, with a longer fork and slacker head angle.
Shimano GRX 400 components are paired with an FSA Omega AGX+ 46/30 crankset, providing a wide range of gears and smooth, instant changes. A Shadow rear derailleur with a clutch reduces the chances of chain slap and drop over rough ground. Hydraulic discs inspire confidence in all conditions, allowing you to stop fast when required.
Rolling on tubeless-ready WTB wheels and tyres, you can switch to a tubeless setup and reap the benefits of lower pressures.
Highlights
- Strong and reliable Cannondale C2 alloy frame and carbon fork
- Shimano GRX 400 10-speed groupset
- Powerful Shimano hydraulic disc brakes
- Plenty of mounting points for bottles and luggage racks
- Built to accept an internally routed 27.2mm dropper seatpost
- Removable mudguard bridge
- Large volume 37c clincher tyres from WTB offer offroad stability
- Wide-ranging gear ratio is perfect for any terrain
- Clearance for 45mm tyres
- Integrated wheel sensor delivers hyper-accurate speed, route and distance info while you ride, registers your bike, reminds of needed services and more, through the Cannondale app
Technical Specification
| Frame | Cannondale SmartForm C2 Alloy, 12x142 thru-axle, tapered headtube, flat mount disc, BSA threaded BB, flat mount disc, StraightShot internal cable routing, multiple gear/bottle mounts |
| Fork | Cannondale Topstone Carbon, 1-1/8" to 1.5" steerer, 55mm OutFront offset, flat mount disc, internal routing, 12x100 thru-axle, mudguard/gear mounts |
| Headset | Integrated, 1-1/8" - 1-1/2" |
| Bottom Bracket | FSA Cartridge |
| Stem | Cannondale 3, 6061 Alloy, 31.8, 7° |
| Handlebar | Cannondale 3, butted 6061 alloy, 16° flare drop |
| Front Brake | Shimano GRX 400, hydraulic disc, 160mm RT54 rotor |
| Rear Brake | Shimano GRX 400, hydraulic disc, 160mm RT54 rotor |
| Brake Levers | Shimano GRX 400 hydraulic disc |
| Front Derailleur | Shimano GRX 400, braze-on |
| Rear Derailleur | Shimano GRX 400, Shadow RD+ |
| Shift Levers | Shimano GRX 400, 10-speed |
| Chain | KMC X10, 10-speed |
| Cassette | Shimano HG500, 11-34t, 10-speed |
| Crankset | FSA Omega AGX+ Alloy, 46/30t |
| Front Wheel | WTB ST i23 TCS, 28h, tubeless-ready rim | Formula cartridge bearing, Center Lock, 12x100mm hub | stainless steel, 14-gram spokes |
| Rear Wheel | WTB ST i23 TCS, 28h, tubeless-ready rim | Formula cartridge bearing, Center Lock, 12x142mm hub | stainless steel, 14-gram spokes |
| Front Tyre | WTB Riddler TCS Light, 700 x 37c, tubeless-ready |
| Rear Tyre | WTB Riddler TCS Light, 700 x 37c, tubeless-ready |
| Saddle | Fizik Aliante Delta, S-alloy rails |
| Seatpost | Cannondale 3, 6061 Alloy, 27.2 x 350mm |
| Pedals | Available to be purchased separately |
| Accessories | Removable rear mudguard bridge |
Built, Checked, Tuned and Tested
All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.
All bikes collected from our shop, are built, tested and ready to ride.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.
If you require any assistance please contact our Customer Care team.