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.
GT Grade Expert Gravel Bike 2021
Blending off-road robustness, a lively and fun character and high value, the GT Grade Expert Gravel Bike serves as a fantastic introduction to the world of two-wheeled adventure riding across a sweep of different surfaces.
The alloy frame amalgamates robustness and lateral stiffness while remaining light to give reliability across rough terrain and an enthusiastic climbing sensation. This frame incorporates GT’s Triple Triangle design that heightens comfort across rutted riding surfaces thanks to its floating seatstays. The carbon fork further improves comfort by damping vibrations and a multitude of rack mounting points across the frameset enables the longest rides to be tackled fully equipped.
The WTB ST i23 rims use their sturdy construction to build into reliable wheels, and their broad inner rim width helps tubeless-ready or standard clincher tyres to give increased traction and cornering stability. The Shimano gears give slick gear changes with every click while the matching hydraulic disc brakes stop precisely in all riding conditions.
Highlights
- A high-value gravel bike full of enthusiasm and fun that serves as a perfect introduction to multi-terrain two-wheeled adventures
- The alloy frameset is robust and reactive and the full carbon fork is responsive to steering input and comfortable
- Triple Triangle frame format allows the seatstays to “float” to grant vast amounts of vertical compliance
- Multiple mounts for luggage carrying on the frame and fork
- WTB ST i23 wheels are robust, have a wide internal rim width and are tubeless-ready tyre compatible
- Shimano Tiagra/GRX 400 gears have a wide range of ratios and are accurate and dependable
- Shimano hydraulic disc brakes stop with accuracy whatever the conditions
Technical Specification
| Frame | GT Grade alloy frame, Triple Triangle design featuring floating seatstays, 12x142 thru-axle, flat mount disc, tapered headtube, external dropper compatible, BSA 73mm |
| Fork | GT Grade carbon fork, tapered carbon steerer, 12x100 thru-axle, flat-mount disc |
| Headset | FSA No.44, integrated, sealed bearing |
| Bottom Bracket | GT Cartridge, square taper |
| Stem | GT 3D forged alloy, 31.8 |
| Handlebar | GT DropTune RS, alloy, 16° flare |
| Bar Tape | Velo cork |
| Front Brake | Shimano Tiagra hydro disc, 160mm RT10 rotor |
| Rear Brake | Shimano Tiagra hydro disc, 140mm RT10 rotor |
| Brake Levers | Shimano Tiagra |
| Front Derailleur | Shimano Tiagra, braze-on |
| Rear Derailleur | Shimano GRX RX400 Shadow Plus, 10-speed |
| Shift Levers | Shimano Tiagra, 10-speed |
| Chain | KMC X10, 10-speed |
| Cassette | Shimano HG500, 11-34, 10-speed |
| Crankset | FSA Vero Pro, 48/32 chainrings |
| Front Wheel | Rim - WTB ST i23 TCS 2.0, 28 hole, tubeless-ready / Hub - Formula CL-712, 12x100mm thru-axle, Center Lock / Spokes - Stainless Steel, 14g |
| Rear Wheel | WTB ST i23 TCS 2.0, 28 hole, tubeless-ready / Hub - Formula RXC-400, 12x142mm thru-axle, Center Lock / Spokes - Stainless Steel, 14g |
| 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 | GT Pavement, steel rails |
| Seatpost | GT two bolt alloy |
| Pedals | GT Plastic OPC Body |
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.