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.
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.
Offering powerful and consistent stopping power these brakes are also easy to maintain.
Cannondale Topstone 4 Gravel Bike 2021
Perfect for riders interested in exploring what lies beyond the tarmac, the Cannondale Topstone 4 Gravel Bike is versatile, accessible, and ready for adventure. With a SmartForm C2 frame and full BallisTec carbon fork, this is a light but rugged ride, with solid out-front handling.
Keeping the drivetrain simple and easy to maintain, Cannondale has specified a one-by 10-speed gearset with cranks from Prowheel and a shifting system from microSHIFT. The cassette has a huge range to help you climb any off-road gradient and zip along the tarmac between trails. Mechanical disc brakes from Promax are easy to maintain and offer equal stopping power in wet and dry conditions.
Rolling on a set of 37c WTB tyres, you'll find great traction on loose ground, while the tread doesn't impede your speed too much while on the road. Load your Topstone up with racks, extra bottles and even mudguards thanks to the abundance of mounting points, and you're set for a long bike packing adventure.
- Strong and reliable Cannondale C2 Alloy frame
- BallisTec Carbon fork provides vibration-reducing lightweight steering
- Low-maintenance one-by 10-speed groupset
- Plenty of mounting points for bottles and luggage racks
- Removeable mudguard bridge
- Large volume 37c clincher tyres from WTB offer offroad stability
- 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||Integrated, 1-1/8" - 1-1/4"|
|Bottom Bracket||Cartridge, square taper|
|Stem||Cannondale 3, 6061 Alloy, 31.8, 7°|
|Handlebar||Cannondale 3, butted 6061 alloy, 16 degree flare drop|
|Bar Tape||Cannondale Bar Tape, 3.5mm|
|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, 10-speed|
|Shift Levers||microSHIFT Advent X, 10-speed|
|Chain||KMC X10, 10-speed|
|Cassette||microSHIFT, 11-48T, 10-speed|
|Front Wheel||RD 2.0, 28-hole rim | Formula alloy, 12x100mm hub | stainless steel, 14-gram spokes|
|Rear Wheel||RD 2.0, 28-hole 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||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 specified), 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. We do not install accessories to bikes, including mudguards.
Cannondale Topstone 4 Gravel Bike 2021 Sizing
Forgotten Your Password?
Please enter your registered email address below and we'll send you an email explaining the next step.
Select a store
Select the store you visit most frequently below and their stock information will show on product pages.