Orbea Onna 20 27,5'' Tanzanite (Matt) / Silver (Gloss) 2027

Orbea Onna 20 27.5" - The ideal MTB to progress on the trails

Equipping yourself with a real mountain bike means opening the doors to adventure and freedom. From forest tracks to more technical dirt trails, every ride improves your handling and enjoyment. Mile after mile, confidence builds, precision increases, and your outings become more sporty.

The Orbea Onna 20 27.5" MTB has been developed to support your progression on the terrain. Its modern geometry offers reassuring stability and excellent control downhill. With its 27.5-inch wheels perfectly scaled to small frames (XS and S), it ensures outstanding maneuverability and dynamic acceleration.

Designed for performance at a controlled price, the Onna 20 features an excellent 100mm RockShox air fork, responsive Shimano hydraulic disc brakes, and the all-new Shimano Cues 1x11s drivetrain. Its frame offers a generous clearance to fit high-volume tyres, perfect for maximizing comfort and grip.

Key features

• ROCKSHOX JUDY AIR FORK: Here, the RockShox Judy Silver fork features an air spring (Solo Air), offering much more precise, smooth, and adjustable damping according to the rider's weight.
• MODERN SHIMANO CUES 1x11s DRIVETRAIN: The Shimano Cues U6000 single-chainring group combined with an 11-50t cassette offers remarkable shifting reliability and a wide gear range to tackle the steepest climbs.
• SHIMANO HYDRAULIC BRAKING: Equipped with Shimano MT200 hydraulic disc brakes, this MTB ensures powerful, progressive, and consistent stopping power, whether the terrain is dry, wet, or muddy.
• LIGHTWEIGHT AND UPGRADABLE FRAME: Made of high-performance aluminium with internal cable routing (ICR), the frame features a tapered headtube and is fully compatible with future dropper seatpost installation.
• ORBEA LIFETIME WARRANTY: Proof of the Spanish brand's build quality and durability, Orbea offers a lifetime warranty on your Onna 20 frame.

Specifications

• FRAME:  Orbea Onna Alloy, Dropout 9x135, BSA BB, Internal cable routing
• FORK: RockShox Judy Silver TK Crown adjust QR Solo Air 100
• CRANKSET: Forged alloy, 32t
• HEADSET: 1"-1/2 Semi-Integrated
• HANDLEBAR: Alloy, 31.8mm, Flat, 740mm, Sweep 9
• STEM: Alloy, 7º
• SHIFTERS: Campagnolo Shimano Cues SL-U6000
• BRAKES: Shimano MT200 Hydraulic Disc
• CASSETTE: Sun Race 11-50t 11-Speed
• REAR DERAILLEUR: Shimano Cues U6000 GS Shadow
• CHAIN: KMC eGlide
• WHEELS: Orbea WH 2.1, Alloy, 27.5", 32H
• TYRES: Kenda Booster 2.40" 30TPI
• SEATPOST: SP 0.6, Alloy, 27.2mm, Setback 0
• PEDALS: VP-537 Black
• SADDLE: Fortune QF-3091

Size guide (indicative dimensions)

• XS (27.5"): 145 to 160 cm (55.1"-65.0")
• S (27.5"): 155 to 170 cm (61.1"-66.9")