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.
Save up to 47% with any one of our 11 Cycle to Work partners, and get the health benefits of a new bike in exchange for tax free salary sacrifice. To find out more about our various partners and how to apply click here.
Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service £99.99 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.
We've partnered with Laka to offer you 30 days free bike Insurance on your new bike purchase over £400. Click here for more info and find out how to claim.
GT eGrade Bolt Electric Gravel Bike
Since its inception, Grade has consistently pushed the boundaries of adventure riding. As the pioneer of purpose-built carbon gravel bikes, it made a resounding impact upon its debut, receiving numerous industry accolades. The introduction of our floating Triple Triangle™ seatstays in 2019 propelled the bike to new heights, earning prestigious titles such as Gravel Bike of the Year from Bike Radar and Bike Rumor. Never content to settle, Grade has undergone further enhancements. The latest iteration features refined geometry, expanded tire clearance, internal cable routing, and ample frame protection, ensuring it is more capable than ever for off-road adventures.
Technical Specification
| Frame | All New Grade Alloy 700c Frame, EnduRoad Triple Triangle Design feat. Floating Seatstays, Mahle Ebikemotion specific design, Internal Battery, Tapered Head Tube |
| Fork | GT Grade E-Carbon, 1.5" Tapered Carbon Steerer, Flat Mount Disc, 12x100 Thru-Axle |
| Rims | Alloy Double Wall, 32h |
| Hubs | (F) Formula CRX-512, 12x100mm / (R) eBikemotion X35+ |
| Spokes | Stainless Steel, 13g |
| Tires | WTB Nano Comp, 700 x 40, Tubeless Ready |
| Pedals | Not included |
| Crank | Shimano GRX, 46/30 |
| Bottom Bracket | Shimano BSA RS500 |
| Chain | KMC X10, 10-speed |
| Rear Cogs | Shimano HG500, 11-34T |
| Front Derailleur | Shimano RX400 |
| Rear Derailleur | Shimano GRX RX400 |
| Shifters | Shimano GRX400, 10-speed |
| Handlebar | GT Butted 6061 Alloy, 16° Flare Drop |
| Grips | GT Grip Bar Tape w/Gel, 3.5mm |
| Stem | GT 3D Forged Alloy, 31.8 |
| Headset | 1.5" Lower to 1-1/8" Upper w/ Reducer, 25mm Alloy Top Cap |
| E-Bike Charger | X35 Charger |
| Brakes | Shimano GRX 400 Hydro Disc, 160/160mm RT56 Rotors |
| Saddle | Fabric Scoop Shallow Sport |
| Seatpost | Alloy Micro Adjust 27.2 x 350mm |
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. For hassle-free home delivery and bike set-up from a qualified mechanic use our Premier Delivery Service.
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.
GT eGrade Bolt Electric Gravel Bike Sizing
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