The Orbea Onna Junior is the perfect companion for the entry into the world of mountain biking. Thanks to its strong aluminum frame and a geometry focused on control and comfort, the Onna Junior masters every trail. With its high-quality MTB components and grippy tires, the bike is ready for boundless adventures.
The Onna was designed for plenty of action. Without neglecting the weight savings in the frame, the developers aimed for extra durability in a bike that is heavily used.
| Product name: | Orbea ONNA XS Junior 50 - 27.5" Youth Mountain Bike - 2025 - Black (gloss/matt) |
| Manufacturer: | Orbea Bikes |
| Item code: | OEA708021 |
| Activity: | Cycling |
| Gender: | kids |
| Material: | Aluminium |
| Usage bikesport: | MTB |
| Chain: | KMC X8 |
| Cassette: | Sun Race CSM66, 8-speed |
| Shifter: | Microshift TS38 |
| Rear derailleur: | Shimano Tourney TX800 |
| Front derailleur: | Shimano M315 | 31.8mm |
| Bottom bracket: | BSA |
| Chainring ratio: | 36-22 |
| Crankset: | Forged alloy, 7/8S |
| Brakes: | Shimano MT200 Hydraulic Disc |
| Wheels: | Mach1 ER20 | 19c |
| Seat post model: | Alloy, 27.2mm, Offset 0 |
| Saddle: | Essax Adv soft 135mm for Orbea |
| Handle bar: | Alloy Flat, 31.8mm | 720mm |
| Stem: | Alloy 31.8mm interface | 7º |
| Fork: | SR Suntour XCE 28 Coil 100mm QR |
| Headset: | 1"-1/8 Semi-Integrated |
| Frame: | Orbea Onna Alloy | Dropout 9x135mm |
| Shifting system (manufacturer): | Shimano |
| Gear ratio: | 11-34 |
| Number of gears - front: | 2 |
| Number of gears - rear: | 8 |
| Shifting type: | Chain - Mechanical |
| Recommended body height: | 145-160cm |
| Brake type: | Disc Brake |
| Wheel size: | 27,5" / 650B (584mm) |
| Seatpost: | Seatpost rigid |
| Frame type: | Hardtail |
| Travel fork: | 100mm |
| Pedals: | VP-537 Black |
| Tires: | Kenda K1153 2.35" 30TPI |
| Brake actuation: | Hydraulic |
| Model year: | 2025 |
| Collection: | Full year |
| Color: | Black |
| Fork construction: | Classic Suspension Fork |
| Manufacturer item code: | R015 |
| Cable routing: | internal |
| Product series: | Orbea - Onna |
| Manufacturer page: | https://www.orbea.com/ |
