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 4 Gravel Bike 2023
The Cannondale Topstone 4 Gravel Bike may be the entry-level alloy model, but it still benefits from the same strong, stiff C2 alloy frame and carbon fork. With longer, slacker OutFront Steering geometry, the bike delivers an agile yet stable ride.
The Topstone rolls on GXD rims and WTB tyres in a 37mm width, but these can be swapped out for something even wider and more comfortable if preferred as it can accept tyres up to 700x45mm. The frame is also dropper post-ready so you can take on even steeper, more technical terrain.
microSHIFT components include a 1x drivetrain for simplicity and easy maintenance and mechanical disc brakes for confidence-inspiring stopping in all conditions. This is a bike that can be loaded up with gear for big adventures thanks to the inclusion of multiple mounting points, or you can keep it light for faster rides.
Highlights
- Strong and reliable Cannondale C2 alloy frame and carbon fork
- microSHIFT components and 1x shifting
- Mechanical 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 | Cartridge, square taper |
| Stem | Cannondale 3, 6061 Alloy, 31.8, 7° |
| Handlebar | Cannondale 3, butted 6061 alloy, 16° flare drop |
| Front Brake | Promax Render R mechanical disc, 160mm rotor |
| Rear Brake | Promax Render R mechanical disc, 160mm rotor |
| Brake Levers | microSHIFT Advent X |
| Rear Derailleur | microSHIFT Advent X |
| Shift Levers | microSHIFT Advent X, 10-speed |
| Chain | KMC X10, 10-speed |
| Cassette | microSHIFT, 11-48, 10-speed |
| Crankset | Prowheel, Charm, 40T |
| Front Wheel | GXD 1.0 rim | Formula alloy, 12x100mm hub | stainless steel, 14-gram spokes |
| Rear Wheel | GXD 1.0 rim | Formula alloy, 12x142mm hub | stainless steel, 14-gram spokes |
| Front Tyre | WTB Riddler Comp, 700 x 37c, clincher |
| Rear Tyre | WTB Riddler Comp, 700 x 37c, clincher |
| Saddle | Cannondale Stage CX |
| Seatpost | Cannondale 4, 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.