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.
Cyclescheme can save you up to 39% on a bike and accessories. Visit our Cycle to Work Scheme page to learn more and claim.
Orbea Gain M20 GRX 810 Disc E-Gravel Bike 2021
A lightweight top-end carbon fibre frameset pairs wonderfully with a powerful motor and some neat gravel-specific equipment to make the Orbea Gain M30 GRX 810 Disc E-Gravel Bike. Get out and explore beyond the tarmac and beyond your comfort zone, with the backing of a 250-watt motor for when the going gets tough. And when you don't need power assistance, this bike rides just like a regular gravel bike.
Glancing at the silhouette of the Orbea Gain, it's easy to miss the fact that this is an e-bike, since the motor is housed within the rear hub and the battery concealed within the down tube. But at the touch of a button, you can harness 250 watts of power to help you up steep single track hills, or fight a headwind on the towpath. Integrated lights on the out-front display bracket and in the seat clamp make for very neat finishing touches, along with the internal cable routing through the stem for a super-clean looking cockpit.
Shimano's GRX 810 groupset is about as good as it gets in terms of gravel-specific equipment. The 1 x 11-speed setup is simple and intuitive with all the gears you need while boasting a lightweight construction too. Schwalbe G-ONE Bite clincher tyres are 38mm wide, with loads of grip for looser surfaces and are also fairly quick on tarmac.
Highlights
- A hugely capable gravel specific e-bike
- Lightweight Orbea Carbon OMR monocoque frameset
- The Mahle Ebikemotion X35 Plus motor is designed to improve your rides, not dominate them
- Motor is located on the wheel axle, not the bottom bracket, so you’ll enjoy pedalling without resistance when the power assist is off
- ICR Plus internal cable routing keeps the cockpit clean looking
- Integrated lights
- Mahle Ebikemotion 248Wh battery neatly housed in the downtube
- Mahle Ebikemotion iWoc ONE interface displays battery and assist levels as you ride
- Endurance geometry is perfect for riding all day long
- Shimano GRX 810 11-speed lightweight gravel-specific groupset
- Schwalbe G-ONE Bite gravel tyres are 38mm wide for superb traction
Battery Specification
- Maximum Assist: 250w up to 25km/hr
- Motor Weight: 3.5kg
- Range: Up to 47 miles / 75km depending on usage and riding conditions
- Battery Power: 248Wh
Technical Specification
| Frame | Orbea Gain Carbon OMR monocoque structure, integrated seat clamp with integrated Lezyne STVZO rear light, ICR internal cable routing, forged bottom bracket BB386 EVO, 135x9 quick release, flat mount disc, 700x40mm maximum tyre clearance, 1" 1/2 semi headset |
| Fork | Orbea Gain OMR carbon fork, with 1-1/5 carbon steerer, 700x40mm maximum tyre clearance, flat mount disc, Orbea 12x100mm Thru-Axle M12x2 P1 Lite, down tube aero integration |
| Headset | Orbea Acros Alloy 1-1/2" Internal Cable Routing |
| Stem | Orbea ICR -8º |
| Handlebar | OC1 All Road, reach 80mm, drop 125mm, flare 12º |
| Front Brake | Shimano GRX ST-RX810 hydraulic disc |
| Rear Brake | Shimano GRX ST-RX810 hydraulic disc |
| Brake Levers | Shimano GRX 810 |
| Rear Derailleur | Shimano GRX RX812 GS |
| Front Derailleur | N/A |
| Shift Levers | Shimano GRX ST-RX810 11-speed |
| Chain | Shimano HG 601, 11-speed |
| Cassette | Shimano XT M8000 11-40t 11-Speed |
| Crankset | Shimano GRX RX810 40t |
| Front Wheel | Fulcrum E-Racing 900 clincher |
| Rear Wheel | Fulcrum E-Racing 900 clincher |
| Front Tyre | Schwalbe G-ONE Bite, 40-622, 700x38C, Performance Line RaceGuard, TLE, ADDIX Classic SkinX, tubeless-ready clincher |
| Rear Tyre | Schwalbe G-ONE Bite, 40-622, 700x38C, Performance Line RaceGuard, TLE, ADDIX Classic Skin, tubeless-ready clincher |
| Saddle | Selle Royal Asphalt GR |
| Seatpost | OC2 Carbon 27.2 Offset 20mm |
| Pedals | Available to be purchased separately |
| Accessories | 60 Lumen COB LED front light on display holder, 11-lumen Lezyne STVZO integrated seat clamp rear light |
| Motor | Mahle Ebikemotion X35 Plus 25kmh (250 watts, 40Nm maximum torque) |
| Remote | Mahle Ebikemotion iWoc ONE |
| Display | Ebikemotion Pulsar One monochrome ANT+ LEV |
| Battery | Mahle Ebikemotion 36V/6.9A 248Wh ANT+ |
| Charger | Mahle Ebikemotion X35 |
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 or contact Customer Care. We do not install accessories to bikes, including mudguards.