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.
A precise, gravel specific gear setup with a wide range of ratios is ideal for any terrain.
Clearance for big volume tyres grants increased traction and comfort over rough terrain.
Cannondale's extensive aluminium expertise makes the frame light, responsive and durable.
The carbon construction dampens impacts and provides instant steering response.
Cannondale Topstone 0 Gravel Bike 2021
Whether you're setting off on an epic bike packing tour or simply fancy exploring some local towpaths, the Cannondale Topstone 0 Gravel Bike is the perfect companion. Built on a strong but light SmartForm C2 Alloy frame with the added benefit of a full carbon fork, this is an excellent combination of lightweight handling and sure-footed stability.
Cannondale has specified an excellent, gravel-specific groupset in the Shimano GRX 800 shifters, derailleurs and hydraulic disc brakes. Shifting is seamless across the wide-ranging 11-34t cassette, with chain slap minimised thanks to the clutch on the rear derailleur, so you can ride hard over rough terrain. The hydraulic disc brakes make stopping assured and powerful, with better modulation allowing you to scrub off the desired amount of speed.
With a host of mounting points, you can add extra bottle cages or a luggage rear rack as well as mudguards thanks to the included removable mudguard bridge. The rims and 37mm WTB tyres are tubeless-ready, so you can choose to set them up without tubes for an even more plush ride with extra offroad grip and no pinch flats.
- Strong and reliable Cannondale C2 Alloy frame
- BallisTec Carbon fork provides vibration-reducing lightweight steering
- Shimano GRX 800 gearset with rear derailleur featuring a clutch mechanism for reduced chain slap
- Powerful Shimano hydraulic disc brakes
- Plenty of mounting points for bottles and luggage racks
- Removeable mudguard bridge
- Large volume 37c clincher tyres from WTB offer offroad stability and tubeless-ready compatibility
- Wide-ranging gear ratio is perfect for any terrain
|Frame||Cannondale SmartForm C2 Alloy, 12x142 thru-axle, tapered headtube, flat mount disc, StraightShot internal cable routing, multiple gear/bottle mounts|
|Fork||Cannondale BallisTec Full Carbon, 1-1/8" to 1-1/4" steerer, 55mm OutFront offset, flat mount disc, internal routing, 12x100 thru-axle|
|Headset||1-1/4" lower bearing, 25mm top cap|
|Bottom Bracket||Shimano BBRS500|
|Stem||Cannondale 3, 6061 Alloy, 31.8, 7°|
|Handlebar||Cannondale 3, butted 6061 alloy, 16-degree flare drop|
|Front Brake||Shimano GRX 800, hydraulic disc, 160mm RT54 rotor|
|Rear Brake||Shimano GRX 800, hydraulic disc, 160mm RT54 rotor|
|Brake Levers||Shimano GRX 800 hydraulic disc|
|Front Derailleur||Shimano GRX 800, braze-on|
|Rear Derailleur||Shimano GRX 810, Shadow RD+|
|Shift Levers||Shimano GRX 800, 11-speed|
|Chain||KMC X11, 11-speed|
|Cassette||Shimano 105, 11-34t, 11-speed|
|Crankset||FSA Omega AGX+ Alloy, 46/30t|
|Front Wheel||WTB KOM Light i23 TCS, 28-hole, tubeless-ready rim, Formula cartridge bearing, Center Lock, 12x100mm hub, stainless steel, 14-gram spokes|
|Rear Wheel||WTB KOM Light i23 TCS, 28-hole, 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 clincher|
|Rear Tyre||WTB Riddler TCS Light, 700 x 37c, tubeless-ready clincher|
|Saddle||Fabric Scoop Radius Sport, steel rails|
|Seatpost||Cannondale 3, 6061 Alloy, 27.2 x 350mm|
|Pedals||Available to be purchased separately|
|Accessories||Removeable 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.