Monday | 9.00am - 5.30pm |
Tuesday | 9.00am - 5.30pm |
Wednesday | 9.00am - 5.30pm |
Thursday | 9.00am - 5.30pm |
Friday | 9.00am - 5.30pm |
Saturday | 9.00am - 5.30pm |
Sunday | 10.00am - 4.00pm |
Bank Holidays | 10.00am - 5.00pm |

Orbea Onna 27 Xs Junior 50 Junior Mountain Bike In Black Gloss-Matt
After uncertain early pedal strokes comes an efficiency of motion and mind that changes the synapses of your brain forever. Strength arrives, discomfort departs, clarity comes even if only for the moment. A lifetime of mountain biking starts here.
Onna means comfort and control - The Onna was designed for a rider who wants to conquer the trail. A bike geometry that maximizes efficiency and control is perfect for any rider who is learning to love MTB.
Balanced handling - Onna boasts balanced geometry with perfect trail manners to maximise the fun for all riders. Add wheel sizes matched to frame size give perfect fit for all riders and the Onna is ready for the trail ahead.
Ready for the trail - With tapered headtube to give a wide choice of 100mm suspension forks, hydraulic disc brakes across all the range and 1x Shimano drivetrain on top models, Onna is equipped for the ride. With plenty of room for wide mountain bike tyres for comfort and grip, Onna isn´t going to limit your adventures.
Features:
- DROPPER POST READY - Onna is fully compatible with internally routed 27.2mm dropper posts, so you will be ready for whatever trails the future holds.
- HYDRAULIC DISC BRAKES - Post mount 160mm hydraulic disc brakes on every Onna.
- THREADED BOTTOM BRACKET - Threaded bottom brackets offer low maintenance are easily replaceable by the home mechanic.
- TAPERED HEADTUBE - A tapered headtube and fork steerer put strength and rigidity where they’re needed while trimming weight with alloy steerer tubes and offering a wider selection of quality forks.
- QUICK RELEASE AXLES - Onna comes with QR axles as standard.
- INTERNAL CABLE ROUTING - Internal Cable Routing is carefully guided along the best path behind the headtube with no rub or rattle.
- RACK MOUNTS - The forged dropouts offer secure mounting points for a wide variety of racks.
- KICKSTAND - The left chainstay of the bike has an integrated mounting point for a kickstand.
- ADVANCED ALUMINIUM FRAME - Onna´s advanced aluminium frame with shaped tubes allows us to fine tune the ride quality. Stiff enough to be fast and responsive, compliant enough to be comfortable and controlled. At Orbea we are proud that the Onna is ready for whatever trails lie ahead.
All UK Mainland Bike Deliveries Over £999 - Free Bike orders are sent via TNT/FedEx with estimated delivery within 1 working day after quoted dispatch time (For Scottish Highlands, Northern Ireland, Isle of Man and the Channel Islands deliveries please allow an additional 1-4 working days).Bike orders under £999 will incur a £20 delivery fee.
Free Delivery On Orders Over £50.00 - When you spend more than £50.00 at 99 Bikes deliveries to a UK mainland address will be free (excludes bikes & large items).Certain regions and territories of the UK will incur additional charges, details of which can be found on our delivery page.
Click & Collect Orders -Please be aware Click & Collect orders may take some time to fulfil. We advise not to travel to your chosen store until you have been notified that your order is ready for collection.
At 99 Bikes our priority is to ensure that you are highly satisfied with your purchase. In the unlikely event that you aren't, we offer a 30 day online return policy* in which you can receive a full refund. Any item including bikes (with the exception of food) can be returned to us for any reason provided it is received by us in an unused and resalable condition in or with its original packaging which must be undamaged.
Find Out More About Returns >

- FrameOrbea Onna Alloy, Dropout 9x135, BSA BB, Internal cable routing
- ForkSR Suntour XCE 28 Coil 100mm QR
- Headset1"-1/8 Semi-Integrated
- CranksetForged alloy, 22x36t, 7/8S
- ShiftersMicroshift TS38
- CassetteSun Race CSM66 11-34t 8-Speed
- Rear DerailleurShimano Tourney TX800
- Front DerailleurShimano M315 31.8mm
- ChainKMC X8
- HandlebarAlloy, 31.8mm, Flat, 720mm
- StemAlloy, 7º
- BrakesShimano MT200 Hydraulic Disc
- WheelsMach1 ER20 19c
- TyresKenda K1153 2.35" 22TPI
- PedalsVP-537 Black
- SeatpostAlloy, 27.2mm, Setback 0
- SaddleEssax Adv soft135mm for Orbea