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 MX 20 Mountain Bike 2021
Getting into a new sport like mountain biking can be daunting, but the simplicity and effectiveness of the Orbea MX 20 Mountain Bike makes for an easy choice. A sturdy but lightweight alloy frame, size-specific wheels and a fork with 100mm of travel amount to a bike with all the features you need and none of the ones you don't. As a hardtail MTB, the MX 20 is best suited to rolling trails, or cross-country riding - with no rear suspension to impede power transfer, it allows you to ride uphill more efficiently.
The Shimano Deore 11-speed gearset is perfect for any terrain, thanks to the wide-ranging cassette. Flick through the gears with ease while the single front chainring makes the system very easy to operate with less chance of dropping your chain. The Shimano hydraulic disc brakes are perfect for off-road riding, with the ability to stop quickly and safely. 2.35" wide Kenda tyres have loads of grip, and with size-specific wheels - 27.5" on the Small and Medium options and 29" on the rest of the range - you get an agile and pacy ride no matter what size you ride.
- Hard Tail MTB with a great specification for the price
- Size-specific wheels ensure a great all-round ride
- SR Suntour XCR32 suspension fork with 100mm of travel
- Shimano hydraulic disc brakes
- Shimano Deore M5100 11-speed shifters and derailleur
- 1x chainset is reliable with less maintenance
- Kenda K1153 2.35" tyres provide plenty of traction
|Frame||Orbea MX AL6061 Alloy, Orbea tube shapes, internal cable routing, rear rack mounting points, Quick Release drop-outs|
|Fork||SR Suntour XCR32 RL Coil with Preload adjuster 100mm quick-release drop-outs|
|Headset||VP-Z104PD 1-1/8" Semi-Cartridge|
|Stem||Orbea Alloy 31.8mm interface 7º|
|Handlebar||Orbea Flat, 31.8mm, 720mm width|
|Front Brake||Shimano MT201 hydraulic disc|
|Rear Brake||Shimano MT201 hydraulic disc|
|Brake Levers||Shimano MT201 hydraulic disc|
|Rear Derailleur||Shimano Deore M5100 SGS Shadow Plus 11-speed|
|Shift Levers||Shimano Deore M5100 11-speed|
|Chain||KMC X11, 11-speed|
|Cassette||Shimano Deore M5100 11-51t 11-speed|
|Crankset||Shimano M5100 32t|
|Front Wheel||Orbea Black Rock 23c Disc clincher (size-specific)|
|Rear Wheel||Orbea Black Rock 23c Disc clincher (size-specific)|
|Front Tyre||Kenda K1153 2.35" 30TPI clincher|
|Rear Tyre||Kenda K1153 2.35" 30TPI clincher|
|Saddle||Selle Royal 2058 DRN|
|Seatpost||Orbea Alloy 27.2 Offset 0|
|Pedals||Available to be purchased separately|
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.
Orbea MX 20 Mountain 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.