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.
The BallisTec carbon frame is light, stiff and compliant for a lively but composed ride.
The lightweight Kingpin system at the rear of the frame gives up to 30mm of plush suspension.
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 Topstone Carbon 2 Gravel Bike 2021
Why limit your exploration to roads and highways, when the Cannondale Topstone Carbon 2 Gravel Bike can open up trails, towpaths and singletrack to your adventures. Boasting a BallisTec carbon fibre frame and fork, this is a fast but stable and lightweight bike. The Kingpin rear suspension system adds a noticeable level of compliance too, making this one of the most comfortable bikes in its class.
Cannondale has specified this option with Shimano's top of the range gravel groupset, the GRX 800 series. You'll notice smooth and quick shifting across the gears, and chain slap can be almost eliminated thanks to the clutch on the rear derailleur, which keeps the chain tensioned while riding over bumps. The hydraulic disc brakes deliver all the stopping power you need and are perfect for changeable conditions, keeping braking consistent when you might be popping in and out of puddles.
The HollowGram OPI SpideRing crankset from Cannondale is the envy of a lot of riders, thanks to its minimal distinctive looks. In this iteration, it sports a sub-compact chainring setup, which when coupled with the wide 11-34t cassette, provides all the gearing options you need for solo steep hills off-road or long flat group rides. And with tubeless-ready tyres and rims, you can choose to set the wheels up with lower tyre pressure for even more comfort and grip off-road.
- Lightweight and strong BallisTec carbon fibre frame
- Kingpin rear suspension system
- BallisTec Carbon fork provides vibration-reducing lightweight steering
- Gravel specific Shimano GRX groupset
- Powerful Shimano hydraulic disc brakes
- Removeable mudguard bridge
- Large volume 37c clincher tyres from WTB offer offroad stability
- Wide-ranging gear ratio is perfect for any terrain
|Frame||Cannondale BallisTec Carbon Frame, Kingpin suspension system, Speed Release thru-axle, dropper post compatible, direct line cable routing|
|Fork||Cannondale BallisTec Full Carbon, 1-1/8" to 1.5" steerer, 55mm OutFront offset, flat mount disc, internal routing, 12x100 Speed Release thru-axle|
|Headset||Integrated, 1-1/8" - 1.5"|
|Bottom Bracket||Cannondale BB30|
|Stem||Cannondale 2, 6061 Alloy, 31.8, 7°|
|Handlebar||Cannondale 3, butted 6061 alloy, 16-degree flare drop|
|Bar Tape||Cannondale Bar Tape, 3.5mm|
|Front Brake||Shimano GRX 800 hydraulic disc, 160mm RT800 rotor|
|Rear Brake||Shimano GRX 800 hydraulic disc, 160mm RT800 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||Shimano HG701, 11-speed|
|Cassette||Shimano Ultegra, 11-34, 11-speed|
|Crankset||Cannondale HollowGram, BB30a, OPI SpideRing, 46/30t|
|Front Wheel||Cannondale HollowGram 22, Superlight Hi-Impact Carbon, 28-hole, 22mm deep, 25mm internal width tubeless-ready rim | HollowGram, cartridge bearing, Center Lock, 12x100mm hub | HollowGram, 2.0/1.8/2.0, straight-pull spokes|
|Rear Wheel||Cannondale HollowGram 22, Superlight Hi-Impact Carbon, 28-hole, 22mm deep, 25mm internal width tubeless-ready rim | HollowGram 3-pawl, Center Lock, cartridge bearing, 12x142mm hub | HollowGram, 2.0/1.8/2.0, straight-pull 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 Shallow Race, titanium rails|
|Seatpost||HollowGram SAVE Carbon, 27.2 x 350mm|
|Pedals||Available to be purchased separately|
|Accessories||Cannondale Wheel Sensor, 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.