Orbea Onna 29 50 Mountain Bike 2026 - Hardtail MTB
Confidence-inspiring handling and dependable components make the Orbea Onna 29 50 a great introduction to mountain biking. Its lightweight alloy frame, 100mm suspension fork and grippy 29in tyres help keep rides comfortable and controlled on mixed terrain.
Key Features:
- Orbea Onna alloy frame with internal routing and balanced trail geometry
- SR Suntour XCE 28 Coil fork with 100mm travel
- Shimano and Microshift 16-speed drivetrain with wide-range gearing
- Shimano MT200 hydraulic disc brakes for reliable stopping power
- 29in alloy wheels with Kenda 2.35in tyres for grip and stability
- Tapered head tube for improved front-end stiffness and upgrade potential
- Available with 0% APR finance
The Orbea Onna 29 50 is designed to make off-road riding approachable, comfortable and fun from the very first trail ride. Its alloy frame uses Orbea’s trail-focused geometry to balance stability and control, helping newer riders feel more confident whether riding woodland singletrack, local trails or gravel paths.
A 100mm SR Suntour suspension fork helps smooth out roots, bumps and uneven surfaces, taking the sting out of rougher ground and improving comfort on longer rides. Combined with the large-volume Kenda tyres and stable 29in wheels, the Onna carries speed well while offering dependable grip across mixed terrain.
The drivetrain combines Shimano and Microshift components to provide a wide range of gears for climbing hills and building confidence on varied terrain. Shimano MT200 hydraulic disc brakes deliver consistent braking performance in wet and dry conditions, giving reassuring control on descents and tighter sections of trail.
Details like internal cable routing keep the frame looking clean while reducing cable clutter, and the tapered head tube improves steering precision while also allowing future fork upgrades if your riding progresses. The result is a capable and versatile hardtail that works equally well for fitness rides, trail centre sessions and discovering new off-road routes.
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | Orbea Onna Alloy, Dropout 9x135, BSA BB, Internal cable routing |
| Fork | SR Suntour XCE 28 Coil 100mm QR |
| Headset | 1"-1/2 Semi-Integrated |
| Stem | Alloy, 7º |
| Bars | Alloy, 31.8mm, Flat, 740mm, Sweep 9 |
| Front Brake | Shimano MT200 Hydraulic Disc |
| Rear Brake | Shimano MT200 Hydraulic Disc |
| Front Mech | Shimano M315 31.8mm |
| Rear Mech | Shimano Tourney TX800 |
| Shifters | Microshift TS38 |
| Speed | 16 |
| Rims | WH 2.1, Alloy, 29", 32H |
| Front Tyre | Kenda K1153 2.35" 22TPI |
| Rear Tyre | Kenda K1153 2.35" 22TPI |
| Seat Post | SP 0.6, Alloy, 27.2mm, Setback 0 |
| Saddle | Essax Adv soft135mm for Orbea |
| Chainset | Forged alloy, 22x36t, 7/8S |
| Chain | KMC X8 |
| Cassette | Sun Race CSM66 11-34t 8-Speed |
| Pedals | VP-537 Black |
Mountain Bike Size Chart
|
Height
|
Bike Size
|
Mountain Bike Size
|
|
4’8” – 5’1”
143 – 155 cm
|
XXS
|
13” (33 cm)
|
|
5’1” – 5’4”
155 – 163 cm
|
XS
|
15” (38 cm)
|
|
5’4” – 5’7”
163 – 170 cm
|
S
|
16” (41 cm)
|
|
5’7” – 5’10”
170 – 178 cm
|
M
|
18” (46cm)
|
|
5’10” – 6’0”
178 – 183 cm
|
L
|
19” (48cm)
|
|
6’0” – 6’3”
183 – 191 cm
|
XL
|
20” (51 cm)
|
|
6’3” – 6’5”
191 – 196 cm
|
XXL
|
21” (53 cm)
|
|
6’5” – 6’9”
196 – 205 cm
|
XXXL
|
22” (56 cm)
|
* Mountain bikes are sized differently to road bikes. Typically, they are sized in inches as the first MTBs were produced in the USA. European brands like Lapierre and Haibike like to use centimetres for all their bikes. The measurements of their mountain bikes doesn’t match their road bikes but are like a simple conversion from the inches measurement. This is why we have included cm measurements in brackets for the Mountain bike column.
Read our bike size guide for more information on sizing.
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